TY  - BOOK
AU  - Hess,Frank Lee
AU  - Steiger,George
TI  - A reconnaissance of the gypsum deposits of California,
T2  - United States. Geological Survey. Bulletin 413
AV  - QE75 .B9 no. 413
PY  - 1910///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Gypsum
N1  - Bibliography: p. 5, 37
ER  -