TY  - RPRT
TI  - FGDC Digital Cartographic Standard for Geologic Map Symbolization (PostScript Implementation)
AU  - U.S. Geological Survey
PY  - 2006
DO  - 10.3133/tm11a2
UR  - https://pubs.usgs.gov/publication/tm11A2
ID  - tm11A2
ER  -