Subject:"Heidorn, Leo (CE'1950)" Remove Subject:"Heidorn, Leo (CE'1950)" Remove Subject:"Heidorn, Leo (CE'1950)" Remove Subject:"Heidorn, Leo (CE'1950)" Remove Subject:"Heidorn, Leo (CE'1950)" Remove Subject:"Heidorn, Leo (CE'1950)" Remove Publication:"Purdue Alumnus" Remove Subject:"Heidorn, Leo (CE'1950)" Remove