Topps Cards that Never Were: 1972 Topps Reference Page
Topps in 1972, Part 10 – SABR's Baseball Cards Research Committee
1967 Topps Frank Howard
Topps in 1972, Part 10 – SABR's Baseball Cards Research Committee
Frank Howard – SABR's Baseball Cards Research Committee
WHEN TOPPS HAD (BASE)BALLS!: MINOR LEAGUE DAYS- FRANK HOWARD
2017 Topps Transcendent
Topps in 1972, Part 10 – SABR's Baseball Cards Research Committee
1962 Topps Baseball
Cards That Never Were: 1960 Topps Frank Howard Baseball cards, Baseball trading cards, Orioles baseball
C.A.: 2022 Topps MLB Rookie of the Year 75th Anniversary Frank Howard