Ready References
Beginner's Corner, Apr. 1940
Using a Naked-Eye Starmap
Star-Finding With a Planisphere
AAVSO Publications and Periodicals
Overview of LabView
Electrometers and Electroscopes
Age of the Earth
Ready References 
Beginner's Corner, Apr. 1940 
Using a Naked-Eye Starmap Star-Finding With a Planisphere AAVSO Publications and Periodicals Overview of LabView Electrometers and Electroscopes Age of the Earth