Wandering Steering

Sorry for the vagueness of this first post but I thought I read some while back two references to cars wandering but the steering rack and ball joints were ok.  The cause, I think, was the arm connecting the steering arm tho the hub.  I can’t find the letters/articles to see the solution, can anybody point me to the relevant magazine issues and or what the suggestions/advise were?  My car is a Paris ’55 Normale.  Thanks.