Books

 https://www.h-net.org/reviews/showrev.php?id=36476 The Rise of the Latin American Baseball Leagues, 1947-1961: Cuba, the Dominican Republic, Mexico, Nicaragua, Panama, Puerto Rico and Venezuela. Jefferson: McFarland

https://www.google.com/books/edition/Puerto_Rico_s_Winter_League/ce8wlREHG_0C?hl=en Puerto Rico's Winter League

A History of Major League Baseball's Launching Pad

By Thomas E. Van Hyning · 2004

https://www.google.com/books/edition/The_Santurce_Crabbers/t0SEaYUjA1QC?hl=en&sa=X&ved=2ahUKEwjA7cHL45aIAxU08MkDHQg7BUUQiqUDegQIFRAH

https://www.google.com/books/edition/The_Caribbean_Series/17Rg0AEACAAJ?hl=en&sa=X&ved=2ahUKEwjA7cHL45aIAxU08MkDHQg7BUUQiqUDegQIFRAC

    search for Van Hyning's books cheapest are around $30

Negro Southern League 1920-1951 cheapest is $32 book review

Black Baseball Players in Canada: A Biographical Dictionary 1881-1960 Jay-Dell Mah is co-author.

https://www.amazon.com/-/es/Marino-Martinez-Peraza/dp/1546997636 History of Cuban amateur baseball - $18

https://www.amazon.com/Baseball-Europe-Country-History/dp/0786437243/ref=sr_1_1?ie=UTF8&qid=1344126152&sr=8-1&keywords=baseball+in+europe

Neil Lanctot, Fair Dealing and Clean Playing: The Hilldale Club and the Development of Black Professional Baseball, 1910-1932 

https://articulo.mercadolibre.com.ve/MLV-760752005-anos-dorados-del-beisbol-venezolano-1927-1945-_JM

    http://beisbolinmortal.blogspot.com/2018/10/dedicatoria-del-gd-jose-antero-nunez.html

https://baseballgb.co.uk/?p=6174
Review of Baseball In Europe by Josh Chetwynd.