Martin, John H. 1893-
Principles of field crop production / by John H. Martin, Warren H. Leonard. - 2d ed. - London : Macmillan c1967. - ix, 1044 p. : ill. ; 24 cm.
Includes bibliographies.
67016360
GB67-18073
Field crops--United States.
SB187.U6 / M3 1967
631.5 / MAP
Principles of field crop production / by John H. Martin, Warren H. Leonard. - 2d ed. - London : Macmillan c1967. - ix, 1044 p. : ill. ; 24 cm.
Includes bibliographies.
67016360
GB67-18073
Field crops--United States.
SB187.U6 / M3 1967
631.5 / MAP