Baseball - Hall of Fame Players, Managers, Owners, Executives
Non-US Issues – SABR's Baseball Cards Research Committee
Sold at Auction: Triple Crown Batters of 1933 Jimmie Foxx and
Chuck Klein Baseball Trading Card Database
Chuck Klein Baseball Sports Trading Card Singles for sale
1929-30 R315 Chuck Klein
1935 Goudey: Over the border line – SABR's Baseball Cards Research
Production – SABR's Baseball Cards Research Committee
Chuck Klein Baseball Trading Card Database