Weston, Curtis R., Bob Stewart, and Glen C. Shinn. “Concentration Of Smoke And Dust Particulate In Selected Vocational Agriculture Laboratories In Missouri”. Journal of Agricultural Education 22, no. 1 (March 28, 1981): 17–23. Accessed February 22, 2025. https://jae-online.org/index.php/jae/article/view/974.