Description |
xiv, 144 pages : illustrations, maps, color plate |
Note |
Frontispiece (col. plate) accompanied by guard sheet with descriptive letterpress. |
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"A thesis presented to the Graduate College of Iowa State College in partial fulfillment of the requirements for the degree of Doctor of Philosophy." - p. v. |
Bibliography |
"Literature cited": pages 133-137. |
Subject |
Blue-winged teal.
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Blue-winged teal. |
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Birds -- North America.
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Birds. |
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North America. |
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