TY  - BOOK
ED  - United States
TI  - Minerals yearbook: Puerto Rico
PY  - 1988///-
CY  - Washington
PB  - U.S. Dept. of the Interior, Bureau of Mines
KW  - Mineral industries
KW  - Puerto Rico
KW  - Statistics
KW  - Periodicals
KW  - Local
N1  - Subtitle varies
ER  -