TY  - RPRT
TI  - Mars chart (experimental), special area A
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1972
DO  - 10.3133/ofr72412
UR  - https://pubs.usgs.gov/publication/ofr72412
ID  - ofr72412
ER  -