Koen Studio.2011-11-282011-11-281952-08-25http://hdl.handle.net/10605/73701952 portrait of Ray Leon Chappelle, a professor of Agricultural Engineering at Texas Technological College.1 print : b&w ; 5 x 3.5 in.The images in this collection are for study purposes, teaching, classroom projection and research only. To use these digital files in any form, an attribution of "Courtesy of the Southwest Collection/Special Collections Library" must accompany the image.Chappelle, Ray Leon.Texas Technological College. Dept. of Agronomy--Faculty.Image