The Union list of microfilms: cumulation 1949–1959 is now available from J.W. Edwards Inc, Ann Arbor, Michigan. This is the last Cumulation which the Philadelphia Bibliographical Center and Union Library Catalogue will publish. With the completion of this Cumulation the Center has carried the burden for total microfilm listings for exactly twenty years without financial support of any kind. Three major developments: the tremendous flood of microfilm accessions among American libraries, the increasing desire to divide materials by types, and the demand to expand the list to include all kinds of photo‐reproduction (i.e. microprint, microcard, etc.) have forced the Center to cease publication with Cumulation 1949–1959. Because of worldwide use of this Union List, an account of its rise, development, and demise may be of interest to librarians and scholars.
(1962), "UNION LIST OF MICROFILMS: LAST CUMULATION: Report received from the Union Library Catalogue, University of Pennsylvania, Philadelphia", Aslib Proceedings, Vol. 14 No. 5, pp. 125-127. https://doi.org/10.1108/eb049870Download as .RIS
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