Ready References
A Guide to Backyard Astronomy
How to Start Right in Astronomy
Choosing Your First Telescope
AAVSO Membership Information
Signal Conditioning and Data Acquisition Basics
Laboratory Optical Work
The Interior of the Earth
Ready References A Guide to Backyard Astronomy How to Start Right in Astronomy Choosing Your First Telescope AAVSO Membership Information 
Signal Conditioning and Data Acquisition Basics 
Laboratory Optical Work The Interior of the Earth