In: MAGALHAES, A. R.; C. FILHO, H.; GARAGORRY, F. L.; GASQUES, J. G.; MOLION, L. C. B.; AMORIM NETO, M. da S.; NOBRE, C. A.; PORTO, E. R.; REBOUÇAS, O. E. The effects of climatic variations on agriculture in Northeast Brazil. Laxenburg: International Institute for Applied Systems Analysis, 1987.

http://www.alice.cnptia.embrapa.br/alice/handle/doc/131755

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