Solomon L. Pollack, Thomas R. Dines, Ward C. Sangren, Norman R. Nielsen, William G. Gerkin, Alfred E. Corduan, Len Nowak, James L. Mueller, Joseph Horner III, Pasteur S. T. Yuen, Jeffery Stein, Margaret M. Mueller: Proceedings of the 24th national conference, ACM 1969, USA, 1969. ACM 1969, ISBN 978-1-4503-7493-4