This 2016 episode covers a time in the the 20th century when the U.S. and Mexico had agreements in place allowing, and even encouraging, Mexican nationals to enter the U.S. to perform agricultural work and other labor in the American Southwest.
Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

Samuel Hartlib and the Hartlib Circle
38:04

Carlos Juan Finlay and Yellow Fever
41:40

SYMHC Classics: Deborah Sampson
37:33