Geo-ecología de las regiones montañosas de las Américas tropicales 
 Geo-ecology of the mountainous regions of the tropical Americas 

 - Bonn :  UNESCO :  Natural resources research division :  Latin America regional conference-LARC :  International geographical union,  1968 
 - 223 p: :  ill., cartes, cartes h. t., graph., graph. h. t., tab. 
 - Colloquium geographicum, 9 .
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