TY  - RPRT
TI  - Research program on the Manson impact structure, Iowa
AU  - Shoemaker, E. M.
AU  - Roddy, D. J.
AU  - Anderson, R. R.
PY  - 1993
UR  - https://ntrs.nasa.gov/citations/19940016293
ID  - 19940016293
ER  -