TY  - BOOK
AU  - Stone,Ralph W.
ED  - Pennsylvania.
TI  - Building stones of Pennsylvania
AV  - TN951.P4 S7
PY  - 1932///
CY  - Harrisburg, Pa.
PB  - Dept. of Internal Affairs, Topographic and Geologic Survey
KW  - Building stones
KW  - Pennsylvania
N1  - At head of title: Pennsylvania Geological Survey, Fourth series; Includes index
ER  -