MLB authenticators: How a little silver sticker stopped baseball's counterfeit problem - Sports Illustrated
Lost and found: The far-fetched journey a treasured baseball took from Descalso's bat and back into his hands 11 years later
3 Binders Full of Baseball Cards 1980s-90s Fleer
Collecting Game-used: More plays than its mud might show / Blowout Buzz
MLB authenticators find value in baseball's mundane moments – Orange County Register
Wallet: Mets Baseball – Museum of the City of New York
MLB Authentication, Hologram Authenticator
MLB Authentication, Hologram Authenticator
Dennis Eckersley Autographed Official MLB Baseball A's, Cardinals PSA 10 Auto Grade Gem Mint 10 PSA/DNA #P06369 - Mill Creek Sports
MLB Authentication, Hologram Authenticator
George Brett Values - MAVIN
Vintage PSA Graded Churchman Sporting Celebrities Sports Card - Hong Kong
Pacific – SABR's Baseball Cards Research Committee