TY  - BOOK
TI  - Survey of metallic and non-metallic minerals, phase 2: republic of Ecuador 
T2  - Technical report, 14
PY  - 1972///
CY  - New York
PB  - United nations development programme
KW  - Géochimie
KW  - Minéralisation
KW  - Equateur
KW  - Loja
KW  - Ecuador
KW  - El Oro
N1  - bibliogr. p. 52, 2 . t
ER  -