المؤلفون: Das, Jishnu, Hammer, Jeffrey S.
URL الوصول: http://elibrary.worldbank.org/doi/pdf/10.1596/1813-9450-3301http://elibrary.worldbank.org/doi/abs/10.1596/1813-9450-3301
المؤلفون: World Bank
URL الوصول: http://elibrary.worldbank.org/doi/pdf/10.1596/0-8213-4230-4http://elibrary.worldbank.org/doi/abs/10.1596/0-8213-4230-4
المؤلفون: Cotlear, Daniel, Walker, Ian, Coignez-Sterling, Veerle, Lenz, Rony, Pinheiro, Carlos Daniel, Ordonez, Fidel, Cardenas, Helmis
URL الوصول: http://elibrary.worldbank.org/doi/pdf/10.1596/0-8213-4190-1http://elibrary.worldbank.org/doi/abs/10.1596/0-8213-4190-1
المؤلفون: Li, Masako
URL الوصول: http://elibrary.worldbank.org/doi/pdf/10.1596/0-8213-3565-0http://elibrary.worldbank.org/doi/abs/10.1596/0-8213-3565-0