Ready References
A Guide to Backyard Astronomy
Names of the Stars
Understanding Celestial Coordinates
AAVSO Observing Programs
Control Instrument Applications
Technique of High Vacuum
Rocks and Layers
Ready References A Guide to Backyard Astronomy Names of the Stars Understanding Celestial Coordinates 
AAVSO Observing Programs 
Control Instrument Applications 
Technique of High Vacuum Rocks and Layers