TY  - RPRT
TI  - Some requirements on lifting vehicles for manned Mars operations.
AU  - Carlson, R. W.
AU  - Swenson, B. L.
AU  - Tindle, E. L.
PY  - 1966
UR  - https://ntrs.nasa.gov/citations/19660045983
ID  - 19660045983
ER  -