TY  - RPRT
TI  - Martian regolith as space radiation shielding
AU  - Simonsen, L. C.
AU  - Nealy, J. E.
AU  - Townsend, L. W.
AU  - Wilson, J. W.
PY  - 1991
UR  - https://ntrs.nasa.gov/citations/19910048753
ID  - 19910048753
ER  -