Cubs historical sleuthing: Mid-1950s edition - Bleed Cubbie Blue
Cubs historical sleuthing: 1947 edition - BVM Sports
weekend free-for-all - February 2-3, 2019 — Ask a Manager
Cubs historical sleuthing: A 1950s spring training mystery - Bleed Cubbie Blue
Wrigley Field historical sleuthing: 1950s scoreboard edition - Bleed Cubbie Blue
John Racanelli – SABR's Baseball Cards Research Committee
Blog – Tipping Pitches
Wrigley Field historical sleuthing: 1960s edition, and a mystery - Bleed Cubbie Blue
Cubs historical sleuthing: 1990s scoreboard edition - Bleed Cubbie Blue