//-->
World population and world food supplies
Russell, Edward J., (1954)
The resourceful earth : a response to Global 2000
Simon, Julian Lincoln, (1984)
Žiznennye resursy zemli
Matoško, Ivan V., (1989)
Farm management research for small farmer development
Dillon, John L., (1993)
Farm management for Asia : a systems approach
MacConnell, Douglas J., (1997)
Agricultural decision analysis
Anderson, Jock R., (1977)