On fathers, sons, and Topps baseball cards

http://www.wfaa.com/story/sports/mlb/rangers/2015/05/29/fathers-sons-topps-baseball-cards/28143389/

Political Parties

John asked: "Dad, I want you to explain to me in detail the good and bad points of the two political parties."

Jefferson Burdick Collection Online -- Metropolitan Museum of Art

http://metmuseum.org/collection/the-collection-online/search?what=Baseball+cards&ft=jefferson+burdick&ao=on&noqs=true&rpp=90&pg=1

Interview with Bruce Yeko, the first full-time card dealer

http://www.oldbaseball.com/refs/Bruce_Yeko.pdf

burdik

http://www.nytimes.com/2012/05/22/sports/baseball/baseball-card-collecting-was-lifes-work-for-jefferson-burdick.html