1923 Radio Operator's Handbook - unusual pocket-sized book from the
crystal radio era. Covers spark gap transmitters, early phone
modulation, etc...

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2262193231


And -


1946 ARRL Radio Amateur's Handbook...

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5713991760


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