Johnson, R. B. Lens Design, Illumination, and Optomechanical Modeling. SPIE Digital Library.
Chicago-viite (17. p.)Johnson, R. Barry. Lens Design, Illumination, and Optomechanical Modeling. SPIE Digital Library.
MLA-viite (9. p.)Johnson, R. Barry. Lens Design, Illumination, and Optomechanical Modeling. SPIE Digital Library.
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