The Agricultural systems of the world
338.1
G857A
Grigg, D B
 The Agricultural systems of the world an evolutionary approach \ D B Grigg - New York : Cambridge University Press, 1974.
 ix, 358p. - Cambridge geographical studies/ed. by B.H. Farmer et.al; 5 .   ISBN: 0-521-20269-8
90347
  Subjects: Agricultural systems; Agricultural geography; Agricultural resources.

