History of farming systems research
Collinson, M. P.
History of farming systems research - London C.A.B. International c2000. - xvi, 432 p. :
0851994059 (alk. paper)
Agricultural systems
630.72 / COL/HI
History of farming systems research - London C.A.B. International c2000. - xvi, 432 p. :
0851994059 (alk. paper)
Agricultural systems
630.72 / COL/HI