TY  - RPRT
TI  - Studies of some unconventional systems for solving various landing problems
AU  - Leland, T. J.
AU  - Mcgehee, J. R.
AU  - Dreher, R. C.
PY  - 1981
UR  - https://ntrs.nasa.gov/citations/19810010541
ID  - 19810010541
ER  -