http://www.attheplate.com/wcbl/PDF/Black%20Players%20ManDak.pdf

http://www.attheplate.com/wcbl/1934_japan_tour.html 

Great minor leaguers

 https://www.baseball-reference.com/register/player.fcgi?id=layne-001ivo

 https://dimenovels.lib.niu.edu/islandora/object/dimenovels:6841#page/60/mode/1up

https://dimenovels.lib.niu.edu/islandora/object/dimenovels:6841#page/72/mode/1up

https://idnc.library.illinois.edu/?a=d&d=NYC18700507&e=-------en-20--1--txt-txIN---------

Ambidextrous japanese pitcher

https://www.baseball-reference.com/register/player.fcgi?id=yoshin001sho 

https://helmarblog.com/2020/11/09/giants-signed-ambidextrous-japanese-pitcher-in-1966/

Baseball card sites

 Gar Miller: http://baseball-cards.net/

 comc.com

 ebay.com

 kronozio.com

 sportlots.com

 opcbaseball.com

https://kit-young-cards.myshopify.com/  

baseballcardstore.ca

https://marketplace.beckett.com/

https://www.californiasportscards.com/

Preston D. Orem: Baseball 1845-1881

https://babel.hathitrust.org/cgi/pt?id=mdp.39015038925627&view=1up&seq=416 

 https://dimenovels.lib.niu.edu/islandora/object/dimenovels:6844#page/81/mode/1up

https://dimenovels.lib.niu.edu/islandora/object/dimenovels:6843#page/73/mode/1up

https://dimenovels.lib.niu.edu/islandora/object/dimenovels:6845#page/71/mode/1up

MILB & NBA

 https://www.baseball-reference.com/register/player.fcgi?id=arnzen001rob

Baseball players at football

 1934