The implementation of complex information systems / Andrew E. Wessel, Wessel, Andrew E. Drukey, Donald L., Graml, Hermann J., Mcdonnell, patricia M., Seydel, Dietrich, Steinacker, Ivo Information storage and retrieval systems case studies. Electronic data processing case studies. 029.7 WEI Includes illustration and index. New York ; Toronto : Wiley, 1979. 1979. 1979 Text xiv, 236 p. : eng Information Science series.