TY  - RPRT
TI  - Geologic map of anthracite-bearing rocks in the north part of the Orwigsburg Quadrangle, Schuylkill County, Pennsylvania
AU  - G.H. Wood
PY  - 1972
DO  - 10.3133/i689
UR  - https://pubs.usgs.gov/publication/i689
ID  - i689
ER  -