Grigg, David Brian
The agricultural systems of the world : an evolutionary approach .-- [London] : Cambridge Univ. Press , 1974
.--IX, 358 p. 23 cm.
ESTUDIOS
AGRICULTURA
The agricultural systems of the world : an evolutionary approach .-- [London] : Cambridge Univ. Press , 1974
.--IX, 358 p. 23 cm.
ESTUDIOS
AGRICULTURA