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by Prothero, Donald R.; Dott, Robert H.
by Donald R. Prothero
by Prothero, Donald R.
by Edited by Donald R. Prothero , Robert J. Emry
by Prothero, Donald R.; Dott, Robert H., Jr.
by Prothero, Donald R.; Schoch, Robert M.
by Kate LoMedico Marriott; Alexander Bartholomew; Donald R. Prothero