Intensive Agriculture. v.13, 1976-77
Verma, Ravi, ed.
Intensive Agriculture. v.13, 1976-77 edited by Ravi Verma - New Delhi Directorate of Extension 1976 - v.13, varies p.; 27cm.
Intensive Agriculture. v.13, 1976-77 edited by Ravi Verma - New Delhi Directorate of Extension 1976 - v.13, varies p.; 27cm.