The agricultural systems on the world; an evolutionary approach
Grigg, D. B.
The agricultural systems on the world; an evolutionary approach - London : Cambridge University, 1974 - 358 p. : mapas - Cambridge Geographical studies ; 5 . - Cambridge Geographical studies ; 5 .
15361
Agricultura.
Agricultura--Historia.
630.9 / G7
The agricultural systems on the world; an evolutionary approach - London : Cambridge University, 1974 - 358 p. : mapas - Cambridge Geographical studies ; 5 . - Cambridge Geographical studies ; 5 .
15361
Agricultura.
Agricultura--Historia.
630.9 / G7