TY  - BOOK
AU  - Grim,Ralph E.
TI  - Modern concepts of clay materials,
AV  - QE471 .G73
PY  - 1942///
CY  - Urbana, Illinois
KW  - Clay
N1  - At head of title: State of Illinois, Dwight H. Green, Governor. Department of Registration and Education, Frank G. Thompson, Director. Division of the State Geological Survey, M. M. Leighton, Chief, Urbana; "Reprinted from the Journal of Geology, vol. I, no. 3, April-May, 1942."
ER  -