Studies of shortwave solar radiation in the U.S.S.R.
A history is presented of measurements of solar vacuum uv and soft x radiation made by rocket and satellite-borne instruments in the U.S.S.R. The origin and mechanism of the production of solar x rays are discussed.
Mandelstam
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P. N. Lebedev Physical Institute ofthe U.S.S.R. Academy of Sciences, Leninsky Prospect 53, Moscow,USSR.