TY  - RPRT
TI  - Map of land modified by man in the Glassport 7 1/2-minute Quadrangle, Allegheny County and vicinity, Pennsylvania
AU  - W.E. Davies
PY  - 1974
DO  - 10.3133/ofr74291
UR  - https://pubs.usgs.gov/publication/ofr74291
ID  - ofr74291
ER  -