Hippolytus' "On Apostolic Tradition"

I have had a rather unpleasant experience attempting to find a copy of Hippolytus’ “On Apostolic Tradition” by Burton Scott Easton.  I twice interlibrary loaned a copy and specifically requested only Easton’s edition, knowing that mistakes are frequent.  However both times I received an edition other than Easton’s.  Rather than anger the interlibrary loan librarians, by pestering them with another request, I am going to try and purhcase it.  Roger Pearse pointed out where I can get an edition on Amazon.com (I can’t believe I neglected to look their myself).  Hopefully I will receive the right one this time.