TY  - RPRT
TI  - Geologic map of part of the Tyrrhena Patera region of Mars (MTM Quadrangle-20252)
AU  - T.K.P. Gregg
AU  - D.A. Crown
AU  - Ronald Greeley
PY  - 1998
DO  - 10.3133/i2556
UR  - https://pubs.usgs.gov/publication/i2556
ID  - i2556
ER  -