PSA launching pop reports for game-used bats - Sports Collectors Digest
TO BID: - Sports Memorabilia Auction selling Baseball Cards
PSA in the News - PSA Blog
Meat – SABR's Baseball Cards Research Committee
1969 Topps Baseball Checklist, Team Set Lists, Variations and Key Details
Top 15 Mark McGwire Baseball Card List - 1984 Rookie Card Value?
Game-Used Baseball Bats Added to PSA Population Report
1961 Nu-Card Scoops Highlighted Game's Greats, Big Events
PSA Unveils New Pro Model Game-Used Bats Population Report