TY  - RPRT
TI  - Selection of colors and patterns for geologic maps of the U.S. Geological Survey
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 2005
DO  - 10.3133/tm11b1
UR  - https://pubs.usgs.gov/publication/tm11B1
ID  - tm11B1
ER  -