I first learnt about Rippetoe's 3x5 program, but the Power Clean seems risky for me for the moment, so I looked for something similar and found Mehdi's Stronglifts. But after one or two sessions of Mehdi's workout, I felt the need to add Pull-ups (well, equivalently, Cable Pulldowns) and more recently, some forearm work. It seems to be working well for me, although it is still too soon to claim to have any result.
But a few minutes ago I have found the origin of both Rippetoe and Mehdi workouts. It was Reg Park who invented the 3x5 (or at least he made it popular) back in the 50s. The most surprising fact is that Reg Parks original workout is almost identical to my modified version of Mehdi with Pull-ups and forearms. See for instance here
Now, my question is: is there something "wrong" with the original Reg Park workouts and therefore the need of Mehdi/Rippetoe? What are the improvements of Mehdi/Rippetoe with respect to the original Reg Park workouts?