Computer center operations / Gerald E. Wagner, John B. Crawford, Donald R. Gruver. Wagner, Gerald E. Crawford, John B. Gruver, Donald R. Electronic data processing departments. HF5548.2 .W27 1984 001.64 19 WAC Includes index. Cincinnati, Ohio : South-Western, c1984. c1984. 1984 Text x, 278 p. : eng