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David Allen Sibley
Sibley. David Allen
David A. Sibley
Sibley: David

See also:

Sibley, David Allen
Elphick, Chris; Dunning, John B Jr & Sibley, David (Editors)
Sibley David A. - National Audubon Society
Sibley, David Allen, Chris Elphick, John B. Dunning, Editors