Cromley, Robert G.
Digital cartography / Robert G. Cromley
Prentice-Hall, 1992
 Buku Teks
Silverberg, Robert
The realm of Prester John / by Robert Silverberg
Doubleday & Company, Inc., 1972
 Buku Teks
Keepin, G. Robert
Physics of nuclear kinetics / G. Robert Keepin
Addison-Wesley, 1965
 Buku Teks
Meyer, Robert G., author
Abnormal psychology / Robert G. Meyer, Paul Salmon
Allyn and Bacon, 1988
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Owens, Robert G.
Organizational behavior in education / Robert G. Owens
Prentice Hall Inc., 1991
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