The first was Loggers World,(1964) then Timber Cutter, (about 1970) then Christian Logger and finally Log Trucker. At one point all four were being published at the same time. Loggers World and Timber Cutter merged, then Christian Logger folded, and finally as noted, Loggers World and Log Trucker combined. I believe the current version was done after Findley Hays sold the publication.
BTW Hallback; I also have Finley's book "Riggin Shack" with his commentaries for the first dozen or so years. And, Logger's World the First 10 Years. Both were put out after Loggers World was sold and Finley and Jean started Riggin Shack which was a mail order book store catering to the tame apes of the woods.