Monday, September 24, 2018

Shout out to Norman Sperling

Recommended read:


Free to borrow at archive.org (bless that project's soul):

https://archive.org/stream/whatyourastronom00sper#page/30


For your convenience:



Amazon link:
http://a.co/d/iIJnvAH

Found it here:
http://www.jir.com/




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