TY  - RPRT
TI  - Distribution and Properties of Large Symmetric Knobs on Mars
AU  - Frey, H.
AU  - Middleton, J.
AU  - Semeniuk, A. M.
PY  - 1985
UR  - https://ntrs.nasa.gov/citations/19850015287
ID  - 19850015287
ER  -