Ready References
Beginner's Corner, Mar. 1939
Dealing With Dew
Caring for Optics
AAVSO: Services to Astronomy
AAVSO Historical Light Curves
Celebrated Variable Stars
Notes on the Construction and Design of Instruments and Apparatus
Ready References 
Beginner's Corner, Mar. 1939 
Dealing With Dew Caring for Optics AAVSO: Services to Astronomy 
AAVSO Historical Light Curves 
Celebrated Variable Stars Notes on the Construction and Design of Instruments and Apparatus