Russell, N. (1992). Sustainable food production in sub-Saharan Africa 1 IITA's contributions ; 2 Constraints and opportunities. International Institute of Tropical Agriculture.
Citazione stile Chigago Style (17a edizione)Russell, Nathan. Sustainable Food Production in Sub-Saharan Africa 1 IITA's Contributions ; 2 Constraints and Opportunities. Ibadan, Nigeria: International Institute of Tropical Agriculture, 1992.
Citatione MLA (9a ed.)Russell, Nathan. Sustainable Food Production in Sub-Saharan Africa 1 IITA's Contributions ; 2 Constraints and Opportunities. International Institute of Tropical Agriculture, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.