The 1986 Fleer Baseball Card Set – Baseball Analytics
Jack Clark Trading Cards: Values, Tracking & Hot Deals
Jack Clark autographed baseball card (San Francisco Giants) 1980
1982 Fleer Baseball Cards Set checklist, prices, values & information
San Francisco Giants Price List - Supercollector Catalog
Topps – Page 22 – SABR's Baseball Cards Research Committee
Jack Clark Gallery Trading Card Database
Item comes fully certified with a tamper-evident, serialized hologram and certificate of authenticity.
Jack Clark autographed baseball card (San Francisco Giants) 1981 Fleer #433
Lot Detail - 1981 Jack Clark San Francisco Giants Game-Used Jersey
The Fan Zone - Search for New and Vintage Sports Cards - 1980 to 1989