TY  - RPRT
TI  - Interpreting geologic maps for engineering purposes: Hollidaysburg quadrangle, Pennsylvania
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1953
DO  - 10.3133/70045409
UR  - https://pubs.usgs.gov/publication/70045409
ID  - 70045409
ER  -