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February 24, 1951


JAMA. 1951;145(8):565-566. doi:10.1001/jama.1951.02920260033012

Bibliographic problems have been greatly magnified in recent years by the high speed of modern research and the large amount of published technical information. A number of new aids for locating information in the literature were discussed at a recent symposium sponsored by the American Chemical Society.1 Subjects discussed included methods of classification of research papers and text material, efficient devices for selecting all articles pertaining to any subject and technics for storage in research libraries. An aid to literature search that does not require expensive equipment and is particularly adaptable to the individual worker's files consists of abstracting by means of key-sort cards which are punched according to a predetermined code covering the various points of interest to the investigator. These can then be sorted either mechanically or manually. For larger projects, the Department of Agriculture has developed a microfilm selector, capable of scanning 70,000 index entries per

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