TY  - BOOK
AU  - Grim,Ralph E.
AU  - Bray,Roger Hammond
AU  - Bradley,William Frank
TI  - The mica in argillaceous sediments,
AV  - TN933 .G75
PY  - 1937///
CY  - Urbana
PB  - Printed by authority of the state of Illinois
KW  - Mica
N1  - At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey; "Reprinted from the American Mineralogist, v. 22, no. 7, pp. 813-829, July, 1937."
ER  -