Siegmund, O. H. UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI. SPIE Digital Library.
Chicago-čujuhus (17. p.)Siegmund, Oswald H. UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI. SPIE Digital Library.
MLA-čujuhus (9. p.)Siegmund, Oswald H. UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI. SPIE Digital Library.
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