Ready References
Beginner's Corner, Sep. 1939
Understanding Celestial Coordinates
Using a Map at the Telescope
Using the Hands-On Astrophysics Manual
Essential Technologies for Making Accurate PC-Based Measurements
Optical Instruments
The Use of Fused Silica
Ready References Understanding Celestial Coordinates Using the Hands-On Astrophysics Manual Essential Technologies for Making Accurate PC-Based Measurements 
