TY  - RPRT
TI  - An engineering research and technology program for an evolving, multi-decade Mission to Planet Earth
AU  - Sadin, Stanley R.
AU  - Johnston, Gordon I.
AU  - Hudson, Wayne R.
PY  - 1991
UR  - https://ntrs.nasa.gov/citations/19920029812
ID  - 19920029812
ER  -