(1997). The great book of birds: The comprehensive illustrated guide to 600 species and their environments. Philadelphia, Pennsylvania: Courage Books.
Trích dẫn kiểu ChicagoThe Great Book of Birds: The Comprehensive Illustrated Guide to 600 Species and Their Environments. Philadelphia, Pennsylvania: Courage Books, 1997.
Deismireacht MLAThe Great Book of Birds: The Comprehensive Illustrated Guide to 600 Species and Their Environments. Philadelphia, Pennsylvania: Courage Books, 1997.
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