Shagam, R. Optical Alignment I. SPIE Digital Library.
Chicago-čujuhus (17. p.)Shagam, Richard. Optical Alignment I. SPIE Digital Library.
MLA-čujuhus (9. p.)Shagam, Richard. Optical Alignment I. SPIE Digital Library.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.