America's crop heritage ; the history of foreign plant introduction by the Federal Government.
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Ames :
Iowa State College Press,
[1950]
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| Subjects: |
| Physical Description: | x, 156 pages : illustrations, portraits, maps. ; 24 cm. |
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| Bibliography: | Includes bibliographies. |