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  1. 1
    Cotton production in far west Texas with emphasis on irrigation and fertilization /
    by Longenecker, D. E. (Donald E.)
    Published 1963
    Government Document Book
  2. 2
    Cotton variety tests in the El Paso Valley, 1943-48 /
    Published 1950
    Government Document Book
  3. 3
    Effect of fertility level, soil texture and irrigation interval on cotton yields in the El Paso Valley, 1957-58 /
    by Longenecker, D. E. (Donald E.)
    Published 1959
    Government Document Book
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