RAND Corporation (1959). "Propellants". In Horgan, M. J.; Palmatier, M. A.; Vogel, J. (eds.). Space handbook: astronautics and its applications (Technical report). United States Government Printing Office. pp. 42–46. 86.
RAND Corporation (1959). "Propulsion systems". In Horgan, M. J.; Palmatier, M. A.; Vogel, J. (eds.). Space handbook: astronautics and its applications (Technical report). United States Government Printing Office. pp. 31–41. 86.