Extinct birds -- Puerto Rico. / https://id.loc.gov/authorities/subjects/sh85014331 https://id.loc.gov/authorities/names/n79063677-781 : Ehrlich, Paul R.
1992
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Extinct birds -- United States. / https://id.loc.gov/authorities/subjects/sh85014331 https://id.loc.gov/authorities/names/n78095330-781 : Ehrlich, Paul R.