title: A COMPUTER SYSTEM FOR A UNION CATALOG: THEME AND VARIATIONS.
mesh_terms: D002383:Catalogs, Union as Topic; D003201:Computers; D001330:Electronic Data Processing; D005371:Filing; D007990:Libraries; D009518:New York; D010506:Periodicals as Topic
keywords: AUTOMATIC DATA PROCESSING; CATALOGS, UNION; COMPUTERS, DIGITAL; PERIODICALS