1. Study of a Superfluid Helium Tanker, NASA contract NAS2–17852, Final Report, October 1988.
2. Study of SIRTF Instrument Changeout and Cryogen Replenishment, NASA contract NAS2–11979, Final Report, November 1985.
3. NASA Johnson Space Center contract NAS9–17872 (current).
4. J.A. Nissen and S.W. Van Sciver, “A Test of the Superfluid Helium On-orbit Transfer Fluid Acquisition System”, 1989 CEC/ICMC Conference (to be published).
5. A.J. Mord et al., “Concepts for On-Orbit Replenishment of Liquid Helium for SIRTF”, Cryogenics 26, p. 107 (1986).