1992 Houston Astros Baseball Trading Cards - Baseball Cards by
Mark Portugal Baseball Cards
Baseball Card Cameos Checklist - Supercollector Catalog
Baseball Card Cameos Checklist - Supercollector Catalog
McKee Coins, Inc. Auction Catalog - J.W. Carberry Collection 45TH
1994 Donruss #199 Mark Portugal Houston Astros
1977 Topps of Cards
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1994 Topps #734 Mark Portugal VG Houston Astros
Astros Price List - Supercollector Catalog