History 430: Theory and Practice
The mining operation at Picher, Oklahoma was the last successful strike in the Tri-State Area. The Picher Lead Company of Joplin was drilling prospect holes in an isolated farming area somewhere northeast of Commerce, Oklahoma in 1914 and made a rich strike in the area that became known as Picher. The town grew almost overnight as miners and their families flooded into the area to be a part of one of the most successful mines in the area. One Daily Oklahoman correspondent called Picher the "last bonanza" of the Tri-State District and said it was fitting that the district's colorful mining history should end in such a climactic way.
Papen, Aubrey, "Silicosis: Discovery, Treatment, and Prevention of the Disease in the Tri-State Mining District from 1900-1950" (2010). Theory and Practice: Hist 430. Paper 33.