TY  - BOOK
AU  - Knapp,George N.
TI  - The foundry sands of Minnesota,
T2  - Minnesota. Geological survey. Bulletin
AV  - QE127 .A22 no. 18
PY  - 1923///
CY  - Minneapolis
PB  - The University of Minnesota
KW  - Sand
N1  - At head of title: The University of Minnesota
ER  -