Iron Man Magazine was mostly oriented towards bodybuilding so Peary Rader started up another side-publication oriented towards heavy weight lifting and what would eventually become Powerlifting. "Iron Man Lifting News" started out in 1954 at brochure size and eventually grew to a full fledged magazine. Issues are pretty rare as they were only available by subscription and never appeared on the newsstand. As a result, a number of incredible training articles flew under the radar. To give you a great example, this issue -- Vol. 4, No 4. from December, 1959 -- was devoted specifically to how to clean and jerk maximum poundages. As you can see, the techniques of several great champions, Schemansky, Kono, Louis Martin, and others were analyzed in great detail.
Copies are extremely hard to come by but in case you are interested, this issue of Lifting News is posted in its entirety in THE IRON LEAGUE.