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Pedro Guerrero Signed 1987 Topps Boardwalk and Baseball Card - Los Ang – PastPros
2019 Topps Update Series Baseball Checklist, Set Info, Boxes, Variations
SABR's Baseball Cards Research Committee – Page 19
Pedro Guerrero Signed 1988 Topps Tiffany Baseball Card - Los Angeles D – PastPros
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Pedro Guerrero Memorabilia, Autographed Pedro Guerrero Collectibles
Trading Card Lots, Sports Trading Cards, Sporting Goods - PicClick AU
2019 Spring Classic - Sports Memorabilia Auctions
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1984 TOPPS Card #90 Pedro Guerrero - Los Angeles Dodgers