ISBN: | |
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语种代码: | eng |
个人名称: | J.J., Bond |
题名: | Technical and economic causes of productivity changes in U.S. wheat production: 1949-76/ Bond J.J., D.E. Umberger. |
出版发行项: | Washington : United Stated department of agriculture , 1979 . |
载体形态: | 102p ill 22cm. |
书目附注: | Includes bibliographical references and index. |