TY  - RPRT
TI  - NAPP and NHAP Photographic Enlargements
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1996
DO  - 10.3133/fs10196
UR  - https://pubs.usgs.gov/publication/fs10196
ID  - fs10196
ER  -