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Soil science in Costa Rica; classification, fertility and conservation
(CATIE, Turrialba (Costa Rica), 1978)
Some information about winged bean in Costa Rica
(CATIE, Turrialba (Costa Rica), 1978)
Wildland conservation in Central America. Facets of wildland conservation in middle America
(CATIE, Turrialba (Costa Rica), 1978)