TY  - BOOK
AU  - Willman,H.B.
TI  - Feldspar in Illinois sands, a study of resources,
AV  - TN948.F3 W5
PY  - 1942///
CY  - Urbana, Illinois
KW  - Feldspar
KW  - Sand
N1  - At head of title: State of Illinois, Dwight H. Green, Governor. Dept. of Registration and Education, Frank G. Thompson, Director. Division of the State Geological Survey, M. M. Leighton, Chief, Urbana
ER  -