References and Notes (1) P.E. Glaser - Science 162, 857, 1968. (2) In 1978 NASA and the U.S. Department of Energy were authorised to commission a $25M study. Boeing Aerospace and Grumman Corporation are involved in these studies. In the U.K., British Aerospace state that they have a £59k study contract from the European Space Agency related to this problem (British Aerospace News No.10 March 1978; Press Release 8 Feb. 1978). (3) Bekey, I. Aerospace Corp, presentation NASA Space Station study NASA-MSFC. Dec.1975. (4) Kassing, D. and Reinhertz, K.K. ESA Journal 2^ 179, 1978. (5) Microwave Systems News, 8^, 38, 1978. (6) Grossi, M.D. and Colombo, G. Jr. of Microwave Power 12, 209, 1977.
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