1. Greenfield, S. M. and Kellogg, W. W., Inquiry into the Feasibility of Weather Reconnaissance from a Satellite Vehicle, Project RAND Report R-365, Santa Monica, California (1951). (Republished in 1960.)
2. Studies of a Minimum Orbital Unmanned Satellite of the Earth (MOUSE);Singer;Astronautica Acta,1955
3. Use of an Artificial Satellite in Upper Air Research;Kallmann;Bul. Amer. Met. Soc.,1957
4. ARWG (Atmospheric Radiation Working Group), Major Problems in Atmospheric Radiation: An Evaluation and Recommendations for Future Efforts, Bul. Amer. Met. Soc., 53, 950–956 (1972).
5. SMIC (Report of the Study of Man's Impact on the Climate), Inadvertent Climate Modification, The MIT Press, Cambridge, Mass. (1971).