TY  - RPRT
TI  - Advanced space system concepts and their orbital support needs (1980 - 2000). Volume 1: Executive summary
AU  - Bekey, I.
AU  - Mayer, H. L.
AU  - Wolfe, M. G.
PY  - 1976
UR  - https://ntrs.nasa.gov/citations/19760023156
ID  - 19760023156
ER  -