TY  - RPRT
TI  - Cost estimation for unmanned lunar and planetary programs
AU  - Dunkin, J. H.
AU  - Pekar, P. R.
AU  - Spadoni, D. J.
AU  - Stone, C. A.
PY  - 1973
UR  - https://ntrs.nasa.gov/citations/19730015113
ID  - 19730015113
ER  -