[ref.54] _Hawrylewicz, E. J.; Hagen, C. A.; and Ehrlich, R.:_ Response of Microorganisms to a Simulated Martian Environment. _In_ Life Sciences and Space Research III, M. Florkin, ed., North-Holland Publ. Co. (Amsterdam), 1965. [ref.55] _Nicks, O. W.; and Reynolds, O. E.:_ Decontamination and Sterilization of Lunar and Planetary Spacecraft. Science, vol. 142, 1963, pp. 539-540. [ref.56] _Phillips, C. R.; and Hoffman, R. K.:_ Sterilization of Interplanetary Vehicles. Science, vol. 132, 1960, pp. 991-995. [ref.57] _Hobby, G.:_ Review of NASA-JPL Spacecraft Sterilization Program. A Review of Space Research. Natl. Acad. Sci.-Nat. Res. Council, Publ. 1079, 1962, ch. 10. App. III. [ref.58] _Bruch, C. W.; Koesterer, M. G.; and Bruch, M. K.:_ Dry-Heat Sterilization: Its Development and Application to Components of Exobiological Space Probes. Develop. Ind. Microbiol., vol. 4, 1963, pp. 334-342. [ref.59] _Koesterer, M. G.:_ Thermal Death Studies on Microbial Spores and Some Considerations for the Sterilization of Spacecraft Components. Develop. Ind. Microbiol., vol. 6, 1964, pp. 268-276. [ref.60] _Hall, L. B.; and Bruch, C. W.:_ Procedures Necessary for the Prevention of Planetary Contamination. _In_ Life Sciences and Space Research III, M. Florkin, ed., North-Holland Publ. Co. (Amsterdam), 1965. [ref.61] _Portner, D. M.; Hoffman, R. K.; Decker, H. M.; and Phillips, C. R.:_ The Level of Microbial Contamination in a Clean Room During a One-Year Period. Rept. 11-65 on NASA Interagency Agreement R-35, 1964. [ref.62] _Bruch, C. W.:_ Some Biological and Physical Factors in Dry-Heat Sterilization: A General Review. _In_ Life Sciences and Space Research II. M. Florkin and A. Dollfus, eds., North-Holland Publ. Co. (Amsterdam), 1964. [ref.63] _Bruch, C. W.:_ Dry-Heat Sterilization for Planetary-Impacting Spacecraft. Tech. Rept. on Spacecraft Sterilization. Jet Propulsion Lab., 1965. [ref.64] _Pollard, E.:_ Pilot Theoretical Study of the Effect of Weightlessness and Densely Ionizing Radiation on Single Cells. Progr. Rept. on Contract NsG-182-62. NASA, 1962. [ref.65] _Lyon, C. J.:_ Auxin Transport in Leaf Epinasty. Plant Physiol., vol. 38, 1963, pp. 567-574. [ref.66] _McKinney, R.; Montgomery, P. O’B.; and Gell, C. F.:_ A Study of the Effects of Zero Gravity on Cell Physiology. _In_ Physical and Biological Phenomena in a Weightless State. Second AAS Symp. Phys. Biol. Phenomena Under Zero Gravity Conditions. E. T. Benedikt and R. W. Halliburton, eds., Advan. Astronaut. Sci., vol. 14, 1963, pp. 291-306.