{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T09:27:06Z","timestamp":1770974826059,"version":"3.50.1"},"reference-count":13,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2007,3,22]],"date-time":"2007-03-22T00:00:00Z","timestamp":1174521600000},"content-version":"vor","delay-in-days":12013,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Am. Soc. Inf. Sci."],"published-print":{"date-parts":[[1974,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Chen's data for the raw frequency of use of 138 physics journals in the science library at M I T are re\u2010examined and converted to densities of use\u2010per\u2010metre of shelf. Other units of size for obtaining densities, and their measurement, are discussed. There is no evidence for synchronous obsolescence in the 1955 to 1968 volumes of these journals: instead there is some statistically significant evidence of greater density of use with greater age. Similar evidence elsewhere is cited. The ranking order for heaviness of use is also radically altered by converting raw frequencies to densities of use.<\/jats:p><jats:p>It is suggested that, for comparing the relative values of different journals, or age groups, in library use or citation studies, analyses of raw frequencies are valueless, and indeed potentially dangerously misleading, until they are converted to allow for the numbers of available items in each group examined.<\/jats:p>","DOI":"10.1002\/asi.4630250308","type":"journal-article","created":{"date-parts":[[2007,6,27]],"date-time":"2007-06-27T17:46:31Z","timestamp":1182966391000},"page":"172-182","source":"Crossref","is-referenced-by-count":34,"title":["Densities of use, and absence of obsolescence, in physics journals at M I T"],"prefix":"10.1002","volume":"25","author":[{"given":"Alexander","family":"Sandison","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2007,3,22]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/asi.4630230405"},{"key":"e_1_2_1_3_2","first-page":"454","article-title":"Statistical Bibliography in the Health Services","volume":"5","author":"Raisig L. M.","year":"1962","journal-title":"Bulletin of the Medical Libraries Association"},{"issue":"8","key":"e_1_2_1_4_2","first-page":"6","article-title":"Citations\u2010to Divided by Items\u2010Published Gives Journal Impact Factor;\u2026","volume":"15","author":"Garfield E.","year":"1972","journal-title":"Current Contents"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1108\/eb026486"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1108\/eb026516"},{"key":"e_1_2_1_7_2","first-page":"431","article-title":"L'Evolution des Publications Scientifiques Primaires\u2014Etudes Statistiques","volume":"14","author":"Boutry G. A.","year":"1969","journal-title":"Bulletin de Bibliotheques de France"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1038\/234368b0"},{"key":"e_1_2_1_9_2","volume-title":"Patterns of citations to articles within journals: a preliminary test of scatter, concentration and obsolescence","author":"Line M. B.","year":"1972"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1038\/232458a0"},{"key":"e_1_2_1_11_2","volume-title":"Yale's Selective Book Retirement Program","author":"Ash L.","year":"1963"},{"issue":"2","key":"e_1_2_1_11_3","first-page":"141","article-title":"Weeding the Collection: A Review of Research on Identifying Obsolete Stock","volume":"23","author":"Seymour C. A.","year":"1971","journal-title":"Libri."},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1108\/eb049462"},{"key":"e_1_2_1_13_2","unstructured":"Institute for Scientific Information.ISI Journal Citation Reports Philadelphia: ISI (1973)."}],"container-title":["Journal of the American Society for Information Science"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fasi.4630250308","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/asistdl.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/asi.4630250308","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T16:28:29Z","timestamp":1759940909000},"score":1,"resource":{"primary":{"URL":"https:\/\/asistdl.onlinelibrary.wiley.com\/doi\/10.1002\/asi.4630250308"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1974,5]]},"references-count":13,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1974,5]]}},"alternative-id":["10.1002\/asi.4630250308"],"URL":"https:\/\/doi.org\/10.1002\/asi.4630250308","archive":["Portico"],"relation":{},"ISSN":["0002-8231","1097-4571"],"issn-type":[{"value":"0002-8231","type":"print"},{"value":"1097-4571","type":"electronic"}],"subject":[],"published":{"date-parts":[[1974,5]]}}}