Cita APA

Graaff, J. d. (1996). The price of soil erosion: An economic evaluation of soil conservation and watershed development. [Netherlands]: s.n..

Citación estilo Chicago

Graaff, Jan de. The Price of Soil Erosion: An Economic Evaluation of Soil Conservation and Watershed Development. [Netherlands]: s.n., 1996.

Cita MLA

Graaff, Jan de. The Price of Soil Erosion: An Economic Evaluation of Soil Conservation and Watershed Development. [Netherlands]: s.n., 1996.