Dr. Erhard Hänssgen's 42 inch (107 cm) Dobsonian Telescope
30 Inch (0.8 meter) Telescope for University of Texas, McDonald Observatory - Boller and Chivens: A History "Where Precision is a Way of Life" - Boller and Chivens were makers of Telescopes and Precision Instruments
Clyde Bone and His Two Unusual Mersenne Telescopes! – Tele Vue Optics, Inc. Blog