Card Prices Update (CPU) published by Mark Lewis was most influential in regard to attention given to rookie cards. The CPU was started in mid-1979 but I'm not sure how many years it lasted. The monthly issues kept an update on all Topps cards from 1951 to 1980 - Bowman cards from 1948 to 1955. There were other earlier baseball card issues included but a great deal of attention was given to first year cards of players. An alphabetical Rookie Card List was printed monthly given updated prices for dozens of major players’ cards.
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