Field crop production /
Wilson, Harold K
Field crop production / by Harold D Hughes and Darrel S Metcalfe - 3rd ed. - New York : Macmillan and co, 1972. - 627p. :
Production
Field crop production / by Harold D Hughes and Darrel S Metcalfe - 3rd ed. - New York : Macmillan and co, 1972. - 627p. :
Production