The record was reviewed by Billboard in its 1955-07-16 issue (page 46) with Boogie Rock listed second. Of course, Billboard reviews cannot be relied upon to distinguish A and B sides. On a humorous note, the same ad linked by xiphophilos appears in this earlier issue of Billboard on the same page as the review.
Trade ads should be generally reliable. After all, the issuing company should know. But I've seen at least one case where the labels were marked as "A" and "B" and a trade ad listed the sides in reverse order. I wonder if other factors beyond the record company's intention might come into play when an advert is being devised. Factors such as typesetting, layout, balance, and eye-appeal come to mind.
The RPM ad in Billboard that announces this release (I've just added a link in the Notes above), promotes only "Boogie Rock," so I assume that the company considered this song the record's A side, despite the higher matrix number.
this record is listed wrong. please look at the session number:
talkin' the blues is 2206
boogie rock is 2207
so the a side is talkin' the blues
and b side is boogie rock