//-->
Landwirtschaft und Regionalpolitik in peri-urbanen Gebieten
Greif, Franz, (1981)
Agricultural development in the Mekong Basin: goals, priorities, and strategies ; a staff study
Brewer, Michael F., (1971)
Multifunctional agriculture : what does the economic literature tell us?
Nilsson, Fredrik Olof Laurentius, (2008)