TY  - RPRT
TI  - Variability of Mars' North Polar water ice cap: I. Analysis of Mariner 9 and Viking Orbiter imaging data
AU  - Deborah S. Bass
AU  - Kenneth E. Herkenhoff
AU  - David A. Paige
PY  - 2000
DO  - 10.1006/icar.1999.6300
UR  - https://pubs.usgs.gov/publication/70022940
ID  - 70022940
ER  -