Spedding, C. R. W.
The biology of agricultural systems / - London ; New York : Academic Press, 1975. - ix, 261 p. : ill. ; 24 cm.
0126565503
Agricultural systems.
Biology, Economic.
630 ACA 1975 A064 Or.
The biology of agricultural systems / - London ; New York : Academic Press, 1975. - ix, 261 p. : ill. ; 24 cm.
0126565503
Agricultural systems.
Biology, Economic.
630 ACA 1975 A064 Or.