TY  - BOOK
AU  - Stone,Ralph Walter
ED  - American Foundrymen's Association.
TI  - Molding sands of Pennsylvania,
T2  - Pennsylvania Geological Survey. Bulletin M 11
PY  - 1928///
CY  - Harrisburg, Pa.
PB  - Topographic and Geologic Survey
KW  - Sand, Foundry
KW  - Pennsylvania
N1  - "Pennsylvania Geological Survey. 4th series."
ER  -