TY  - BOOK
TI  - Survey metallic and non-metallic minerals, phase 2: republic of Ecuador 
T2  - Technical report, 13
PY  - 1972///
CY  - New York
PB  - United nations development programme
KW  - Géologie économique
KW  - Géochimie
KW  - Exploration
KW  - Minéral
KW  - Equateur
KW  - Loja
KW  - El Oro
N1  - bibliogr. p. 45-46, 2
ER  -