Audubon, . (1980). Audubon Vol. 82. NEW YORK: NATIONAL AUDUBON SOC.
Audubon, . 1980. Audubon Vol. 82. NEW YORK: NATIONAL AUDUBON SOC.
Audubon, . Audubon Vol. 82. NEW YORK: NATIONAL AUDUBON SOC. 1980.
