Nelson, R. (1996). Erosion / productivity modelling of maize farming in the Philippine uplands. SEAMEO Regional Center for Graduate Study and Research in Agriculture.
Citace podle Chicago (17th ed.)Nelson, R.A. Erosion / Productivity Modelling of Maize Farming in the Philippine Uplands. Los Baños, Laguna: SEAMEO Regional Center for Graduate Study and Research in Agriculture, 1996.
Citace podle MLA (9th ed.)Nelson, R.A. Erosion / Productivity Modelling of Maize Farming in the Philippine Uplands. SEAMEO Regional Center for Graduate Study and Research in Agriculture, 1996.
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