TY  - RPRT
TI  - A Topographic Field Trip of Washington, D.C. - A Cartographic Multimedia Application
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1999
DO  - 10.3133/fs17899
UR  - https://pubs.usgs.gov/publication/fs17899
ID  - fs17899
ER  -