http://www.seamheads.com/NegroLgs/player.php?playerID=bell-01coo

projecting player performance

http://seamheads.com/blog/projecting-x-how-to-forecast-baseball-player-performance/

1916 and 1917 reach guide

https://archive.org/stream/reachofficialame19161phil#page/n193/mode/1up

1917 spalding

https://archive.org/stream/spaldingsofficia02#page/107/mode/1up

look at tomorrow

http://baseballnuggets.blogspot.com/2017/09/spaldings-official-base-ball-record.html

1921 spalding guide

https://library.si.edu/digital-library/book/spaldingsofficia19211chad

position player to pitcher, then back again, and again.

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

funny

https://90feetofperfection.com/2010/09/04/25-incredible-rickey-henderson-quotes-stories-all-which-may-or-may-not-be-true/

http://www.starsofthediamond.com/zeenuts.html

1940 play ball pep young $5 shipped

https://www.ebay.com/itm/1940-Play-Ball-106-Pep-Young-GVG-Pirates-122351/163990627346?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D57921%26meid%3D28e10a34809f4f9b9b8c4399d913d8c1%26pid%3D100005%26rk%3D2%26rkt%3D12%26mehot%3Dpf%26sd%3D233268620961%26itm%3D163990627346%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100005.m1851

Good seller. Includes Zeenuts for $9

https://www.ebay.com/sch/occards-on-the-bay/m.html?_nkw=&_armrs=1&_ipg=&_from=

Topps Venezuelan

https://toppsvenezuelan.weebly.com/

newspaper sources

https://news.google.com/newspapers?nid=k_8v9Q84L5sC&dat=19180704&printsec=frontpage&hl=en  toledo 1918.