WHEN TOPPS HAD (BASE)BALLS!: CAREER CAPPER # 13: 1977 BILLY WILLIAMS
Cubs Hall of Famer Ferguson Jenkins -- Chicago Tribune
Chicago Cubs reserves take active part in team's run - Sports Illustrated
The 1973 Cubs: Swan Song of a Dynasty That Never Was
Cubs Trio: Ernie Banks, Fergie Jenkins and Billy Williams autographed limited edition print
Don't Tell Them any Different”: Don Kessinger Night Caps a Long Career – Society for American Baseball Research
Looking Back: The Rich History of Chicago Cubs Sports Memorabilia
MLB All-Decade Team -- Who made our squad of baseball's best from 2010-2019? - ESPN
Billy Williams top moments
Chicago Cubs reserves take active part in team's run - Sports Illustrated