J.R. Richard Baseball Cards
J.R. Richard Baseball Stats by Baseball Almanac
1976 Topps # 1976 Topps Houston Astros Team Set
Topps in 1972, Part 6 – SABR's Baseball Cards Research Committee
Magazine Inserts Pricelist - Supercollector Catalog
Houston Astros Sports Cards Values - GoCollect (houston-astros , page 5)
Houston Astros Gallery
1976 Topps Houston Astros Near Team Set Houston Astros (Set) EX+ Astros : Collectibles & Fine Art
1976 Topps Houston Astros Near Team Set Houston Astros (Set) EX+ Astros : Collectibles & Fine Art
Topps – Page 4 – SABR's Baseball Cards Research Committee
Oakland A's Price List - Supercollector Catalog