Não informado. (1969). Comments on astrophysics and space physics. Gordon and Breach.
Chicago-viite (17. p.)Não informado. Comments on Astrophysics and Space Physics. New York: Gordon and Breach, 1969.
MLA-viite (8. p.)Não informado. Comments on Astrophysics and Space Physics. Gordon and Breach, 1969.
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