Não informado. (1960). Conservationist. New York State Department of Environmental Conservation.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Conservationist. Albany, NY: New York State Department of Environmental Conservation, 1960.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Conservationist. New York State Department of Environmental Conservation, 1960.
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