Wetzel, Robert A.
Limnological analyses / Robert G. Wetzel, Gene E. Likens
Springer-Verlag, 1990
 Buku Teks
Wetzel, Robert G.
Limnology / Robert G. Wetzel
Saunders College Publishing, 1983
 Buku Teks
Middleton, Robert Gordon, 1908-, author
Audels handy book of practical electricity / Robert G. Middleton
D. B. Taraporevala Sons & Co., 1969
 Buku Teks
Farrel, Robert E.
RNA methodologies : a laboratory guide for isolation and characterization / Robert E. Farrell
Academic press, 1993
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Davis, Robert J.
Digital and computer projects / Robert J. Davis
Newnes, 1999
 Buku Teks
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