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by Purves, Dale; Augustine, George J.; Fitzpatrick, David; et al.
by Purves, Alex C.
by Paul D. Purves; Dr. George J. Klein; Dr. Peter Leong-Sit; et al.
by Purves, Barry J. C.
by Purves, Alan C.; Purves, Ted
by Purves; Barry J. C.
by Alex C. Purves
by Purves, Paul D.; Klein, George J.; Leong-sit, Peter; et al.