TY  - RPRT
TI  - Heliogyro solar sailer Summary report
AU  - Hedgepeth, J. M.
AU  - Mac Neal, R. H.
AU  - Schuerch, H. U.
PY  - 1969
UR  - https://ntrs.nasa.gov/citations/19690019483
ID  - 19690019483
ER  -