TY  - BOOK
AU  - Gillson,Joseph L.
TI  - Industrial minerals and rocks: (normetallics other than fuels) 
U1  - 553.6 21st ed.
PY  - 1960///.
CY  - New York: 
PB  - The American Institute of Mining, Metallurgical, and Petroleum Engineers, 
KW  - Industrial minerals
KW  - Rocks
KW  - Geology, Economic
KW  - United States
N1  - Includes bibliographical references and index (p. 909-934)
ER  -