TY  - BOOK
AU  - Stone,Ralph W.
TI  - Gypsum deposits of the United States,
T2  - U.S. Geological survey. Bulletin
AV  - QE75 .B9 no. 697
PY  - 1920///
CY  - Washington
PB  - Govt. print. off.
KW  - Mines and mineral resources
KW  - United States
KW  - Gypsum
N1  - Bibliography: p. 309-316
ER  -