TY  - BOOK
AU  - Tromp,S.W.
ED  - United Nations.
ED  - El Salvador.
TI  - Development of Geological resources in El Salvador
U1  - 333.7 
PY  - 1954///
CY  - New York
PB  - United Nations
KW  - Geology
KW  - El Salvador
N1  - Bibliography : p. 83-100
ER  -