Principles of field crop production
Martin, John H. 1893-
Principles of field crop production [by] John H. Martin [and] Warren H. Leonard. - New York, Macmillan Co., 1949. - ix, 1176 p. illus., maps. 22 cm.
"References" at end of each chapter.
agr49000449
Field crops--United States.
SB187.U6 / M3
Principles of field crop production [by] John H. Martin [and] Warren H. Leonard. - New York, Macmillan Co., 1949. - ix, 1176 p. illus., maps. 22 cm.
"References" at end of each chapter.
agr49000449
Field crops--United States.
SB187.U6 / M3