Ready References
Beginner's Corner, Dec. 1939
Using a Naked-Eye Starmap
Star-Finding With a Planisphere
AAVSO Historical Light Curves
Stepper Servo Motors
Technique of High Vacuum
Glass Blowing for the Laboratory
Ready References 
Beginner's Corner, Dec. 1939 
Using a Naked-Eye Starmap Star-Finding With a Planisphere 
AAVSO Historical Light Curves Stepper Servo Motors Technique of High Vacuum Glass Blowing for the Laboratory