Straka, S. Optical System Contamination: Effects, Measurements, and Control 2008. SPIE Digital Library.
Chicago-viite (17. p.)Straka, Sharon. Optical System Contamination: Effects, Measurements, and Control 2008. SPIE Digital Library.
MLA-viite (9. p.)Straka, Sharon. Optical System Contamination: Effects, Measurements, and Control 2008. SPIE Digital Library.
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