Robert S. Ridgely and Paul J. Greenfield ; with the collaboration of Mark B. Robbins and Paul Coopmans ; in association with the Academy of Natural Sciences ; [foreword by Frank B. Gill]

Comstock 2001 The birds of Ecuador / Robert S. Ridgely and Paul J. Greenfield v. 2

pbk

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Robert S. Ridgely and Paul J. Greenfield ; with the collaboration of Mark B. Robbins and Paul Coopmans ; in association with the Academy of Natural Sciences

Comstock 2001 The birds of Ecuador / Robert S. Ridgely and Paul J. Greenfield v. 1

pbk

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University of Texas Press 1994 1st ed The birds of South America / by Robert S. Ridgely and Guy Tudor ; in association with the Academy of Natural Sciences of Philadelphia v. 2

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by Robert S. Ridgely and John A. Gwynne, Jr

Princeton University Press c1989 2nd ed

alk. paper , pbk.

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by Robert S. Ridgely and Guy Tudor ; with the collaboration of William L. Brown ; in association with World Wildlife Fund

Oxford University Press 1989

v. 1

所蔵館1館

by Robert S. Ridgely and Guy Tudor ; in association with the Academy of Natural Sciences of Philadelphia

University of Texas Press 1989- 1st ed.

v. 1 , v. 2

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John S. Dunning with the collaboration of Robert S. Ridgely

Harrowood Books c1987

pbk.

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by Robert S. Ridgely ; illustrated by John A. Gwynne, Jr.

Princeton University Press [c1976]

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