A quick Google search for will yield dozens of results on torrent sites, Russian trackers (like RuTracker), and file-sharing forums.
However, there is good news for the digital lover: encyclopedia of chess openings volume b pdf
The original Encyclopedia of Chess Openings was published by Šahovski Informant (Chess Informant) beginning in the 1970s. The physical books are heavy, the bindings break under constant use, and most importantly, . A quick Google search for will yield dozens