Wetzel, Robert G.
Limnology / Robert G. Wetzel
Saunders College Publishing, 1983
Buku Teks
Bor, Robert
Counselling in schools / Robert Bort
Sage, 2002
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Branner, Robert
Gothic architecture / Robert Branner
George Braziller, 1961
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Harris, Robert
Fatherland / Robert Harris
Arrow Books, 2012
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Ross, Robert
Research : an introduction Robert Ross
N.Y. Barnes & Noble Books, 1974
Buku Teks