TY  - BOOK
AU  - SCHWOCHOW, STEPHEN D.
TI  - PROCEEDING OF THE FIFTEENTH FORUM ON GEOLOGY OF INDUSTRIAL MINERALS
T2  - 0
U1  - 550 
PY  - 1980///
CY  - DENVER-COLORADO-U.S.A.
PB  - COLORADO GEOLOGICAL SURVE
KW  - CIENCIAS PURAS
N1  - CONSTRUCCION MATERIALS AND LAND USE
ER  -