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Martin, John H. 1893-

Principles of field crop production / John H. Martin [and] Warren H. Leonard. - New York : Macmillan Co., c1949. - ix, 1176 p. : illus., maps ; 22 cm.

"References" at end of each chapter.

agr49000449


Field crops.--United States.

SB187.U6 / M3

631.5 / MAP
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