El sol de mayo : memorias de la intervención / [por] Juan A. Mateos. Nota preliminar de Clementina Díaz y de Ovando
El sol de los jaguares : leyendas, cuentos y narraciones de la selva amazónica / Ciro Alegría ; selección de Dora Varona
The soils of Cuba / by Hugh H. Bennett … and Robert V. Allison … including a generalized soil map and detailed descriptions of the physical and chemical qualities of the more important types, together with notes upon their general cultural requirement
Soil map of the world 1:5.000.000, volume III, Mexico and Central America / FAO Food and Agriculture Organization of the United Nations, UNESCO United Nations Educational Scientific and Cultural Organization