TY  - RPRT
TI  - The National Map - Orthoimagery Layer
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 2007
DO  - 10.3133/fs20073008
UR  - https://pubs.usgs.gov/publication/fs20073008
ID  - fs20073008
ER  -