> Mehrbändiges Werk
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1:
The birds of Ecuador 1 Status, distribution, and taxonomy Robert S. Ridgely and Paul J. Greenfield
Ithaca, NY: Cornell Univ. Press, 19XX-
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2:
The birds of Ecuador 2 Field guide Robert S. Ridgely and Paul J. Greenfield
Ithaca, NY: Cornell Univ. Press, 19XX-