Computers in Education, 1962.
MacMillan Co, London & NY, Pergamon Press, 1962, first edition; 122 pages, Index, references,
MacMillan Co, London & NY, Pergamon Press, 1962, first edition; 122 pages, Index, references,
IFIP International Federation for Information Processing, The Netherlands 1970; 3 volumes.
Doubleday/Random House NY 1999, stated first edition; 221 pages, index.