Here are 2 early issues of ERB Collector. #6 has some liquid damage to the back cover. Looks like a coffee cup was set down on it. #11 is nearly perfect.
Interesting articles -- one has a geneaology of Burroughs from Alfred the Great and Charlemagne (!) -- others talk about dum dums, etc. There are ads and price lists, too. I spotted a Roy G. Krenkel illustration, plus photos and clippings from trade journals about Burroughs. Interesting stuff.