Tim Jenkins – SABR's Baseball Cards Research Committee
2010 ~ Baseball Happenings
2010 ~ Baseball Happenings
2010 ~ Baseball Happenings
The Modern Hobby Guide To Topps Chewing Gum 1938 To 1956
2010 ~ Baseball Happenings
Healthy Life 2021 by Gulfshore Life - Issuu
June 2011 Catalog - Sports Memorabilia Auctions
Leland's Classic - Sports Memorabilia Auctions
Elmer Singleton – Society for American Baseball Research
The Green Weenie: December 2015
2010 California Baseball Information Guide by Cal Media Relations
Tim Jenkins – SABR's Baseball Cards Research Committee