Historian. Manuscripts (1987–2000) by Nigel Anthony Sellars for his book, Oil, Wheat, & Wobblies: The Industrial Workers of the World in Oklahoma, 1905–1930, and for Sellars's articles and essays on Oklahoma labor issues, labor unions, and the Industrial Workers of the World during the period of 1905–1930; research materials collected by Sellars for his writings; and publications (1980–2001) regarding labor and socialist issues in Oklahoma and the nation.