1.

図書
図書
1. The Audubon Society field guide to North American wildflowers, eastern region
William A. Niering and Nancy C. Olmstead ; visual key by Susan Rayfield and Carol Nehring
出版情報: New York : Knopf : distributed by Random House, 1979
シリーズ名: Audubon Society field guide series
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2.

図書
図書
2. The Audubon Society field guide to North American birds, eastern region
John Bull and John Farrand ; visual key by Susan Rayfield
出版情報: New York : Knopf , New York : distributed by Random House, c1977
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3.

図書
図書
3. The Audubon Society field guide to North American rocks and minerals
Charles W. Chesterman ; scientific consultant, Kurt E. Lowe
出版情報: New York : Knopf, 1978
シリーズ名: Audubon Society field guide series
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4.

図書
図書
4. The Audubon Society field guide to North American reptiles and amphibians. A Chanticleer Press ed
John L. Behler, F. Wayne King
出版情報: New York : Knopf : Distributed by Random House, c1979
シリーズ名: Audubon Society field guide series
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