The Agricultural systems of the world :
Grigg, D. B.
The Agricultural systems of the world : an evolutionory approach / D.B. Grigg. - Cambridge : Cambridge Univerisity Press, 1974. - ix, 358 p. : ill. ; 23 cm. - Cambridge geographical studies .
Includes bibliographical references and index.
Agricultural systems.
S494.5.S95 / G75 1974
The Agricultural systems of the world : an evolutionory approach / D.B. Grigg. - Cambridge : Cambridge Univerisity Press, 1974. - ix, 358 p. : ill. ; 23 cm. - Cambridge geographical studies .
Includes bibliographical references and index.
Agricultural systems.
S494.5.S95 / G75 1974