Subject:"Harrold, David E. (MS'1951)" Remove Publication:"Purdue Alumnus" Remove Subject:"Harrold, David E. (MS'1951)" Remove Subject:"Harrold, David E. (MS'1951)" Remove Publication Year:"1973" Remove Subject:"Harrold, David E. (MS'1951)" Remove Subject:"Harrold, David E. (MS'1951)" Remove