San Diego Padres Price List - Supercollector Catalog
1990 Bowman #454 Mark McGwire Oakland Athletics MLB
Clyde's Stale Cards: October 2011
Clyde's Stale Cards: October 2011
1991 Donruss Bonus Cards #BC9 Mark McGwire UER/Home Run Milestone
Mark McGwire Cards & Items Baseball Cards Set checklist, prices
Calaméo - 2016 August
Clyde's Stale Cards: October 2011
1991 Donruss #56 Mark McGwire AS - NM-MT
Mark McGwire Baseball Trading Card Database
Mark McGwire Cards & Items Baseball Cards Set checklist, prices