1. Asst. Prof., Div. of Materials Engrg., Coll. of Engrg., Univ. of Iowa, Iowa City, Iowa
2. Chief of Concepts and Technology, U.S. Army Armament Command, Rock Island, Ill.
3. Prof., Div. of Materials Engrg., Coll. of Engrg., Univ. of Iowa, Iowa City, Iowa