+
+%A D.L. Bitzer
+%A D. Skaperdas
+%T The Economics of a Large Scale Computer Based Educational System: Plato IV
+%B Computer Assisted Instruction, Testing and Guidance
+%E Wayne Holtzman
+%P 17-29
+%I Harper and Row
+%C New York
+%D 1970
+
+%A D.C. Gray
+%A J.P. Hulskamp
+%A J.H. Kumm
+%A S. Lichtenstein
+%A N.E. Nimmervoll
+%T COALA - A Minicomputer CAI System
+%J IEEE Trans. Education
+%V E-20(1)
+%P 73-77
+%D Feb. 1977
+
+%A P. Suppes
+%T On Using Computers to Individualize Instruction
+%B The Computer in American Education
+%P 11-24
+%I John Wiley
+%C New York
+%D 1967
+%E D.D. Bushnell and D.W. Allen
+
+%A B.F. Skinner
+%T Why We Need Teaching Machines
+%J Harv. Educ. Review
+%V 31
+%P 377-398
+%O Reprinted in \fIEducational Technology,\fP ed. J.P. DeCecco, Holt Rinehart & Winston (New York, 1964)
+%D 1961
+
+%A B.W. Kernighan
+%T A Tutorial Introduction to the UNIX text editor
+%O Bell Laboratories internal memorandum
+%D 1974
+