Already have my dad's, but had to share:
http://cgi.ebay.com/1953-Book-RADIOTRON ... 19c64925b5
FWIW, everyone dogs on RDH3, but I love it and you can read it like a book, unlike the reference tome that is the 4th ed. I recommend picking up one of those, too. I found the above link while searching for a 1st or 2nd edition. If anyone has one - preferably cheap - please let me know.
Shannon