World population and food supplies, 1980 a symposium sponsored by the American Society of Agronomy.
| Соавтор: | |
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| Формат: | |
| Язык: | English |
| Опубликовано: |
Madison
Wis.
1965.
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| Серии: | Its Special publications
no. 6 |
| Предметы: |