Davis, William S.
Information processing systems
Addison-Wesley, 1981
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Long, Larry E.
Introduction to computers and information systems
Prentice-Hall, 1994
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Mader, Chris
Information systems : technology, economics, applications
Science Research Associates , 1974
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Nickerson, Raymon S.
Using computers : human factors in information systems
MIT Press, 1986
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Garrett, Raymon D., 1935-
Hospitals : a systems approach
Auerbach, 1973
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