TY  - BOOK
ED  - Pennsylvania Compensation Rating and Inspection Bureau.
TI  - Statistical analysis of coal mine accidents in Pennsylvania, 1916 to 1922 inclusive
AV  - HD7269 .M61 U645
PY  - 1924///]
CY  - Harrisburg
KW  - Coal mine accidents
KW  - Coal mines and mining
KW  - Pennsylvania
ER  -