SABR 50 at 50: Baseball Cards – Society for American Baseball Research
Errors / Variations Gallery - 1973 Topps Baseball
SABR 50 at 50: Baseball Cards – Society for American Baseball Research
1973 – Ugliest Topps Baseball Set Ever – SABR's Baseball Cards
Results: Ugliest Card from the 1970's
The Ugliest Baseball Cards
Revisiting the 1973 Set – The Ugliest Topps Baseball Set Ever
1973 Topps Baseball - Trading Card Database
1973 – Ugliest Topps Baseball Set Ever – SABR's Baseball Cards
1973 – Ugliest Topps Baseball Set Ever – SABR's Baseball Cards
Six Awesomely Amusing 1973 Topps Baseball Cards – Post War Cards
1973 Topps Comics 'Test' Set an Unreleased Rarity
1973 Topps Baseball - Trading Card Database