1. Wikipedia, “Helium Neon Laser,” Wikimedia Foundation,4 June 2014, (1 August 2014).
2. Steward Observatory’s New 90-inch Reflector;Hilliard,1967
3. Optical Sciences Center, “Floor Plan of NEW Optical Sciences Building,” OSC Newsletter 8(12), 28 (1974).
4. The Shack Interferometer from a Thirty Year Perspective;Hopkins,2005
5. Richard Buchroeder with his 3 mirror Yolo telescope;Stevick,2014