1 2%A D.L. Bitzer 3%A D. Skaperdas 4%T The Economics of a Large Scale Computer Based Educational System: Plato IV 5%B Computer Assisted Instruction, Testing and Guidance 6%E Wayne Holtzman 7%P 17-29 8%I Harper and Row 9%C New York 10%D 1970 11 12%A D.C. Gray 13%A J.P. Hulskamp 14%A J.H. Kumm 15%A S. Lichtenstein 16%A N.E. Nimmervoll 17%T COALA - A Minicomputer CAI System 18%J IEEE Trans. Education 19%V E-20(1) 20%P 73-77 21%D Feb. 1977 22 23%A P. Suppes 24%T On Using Computers to Individualize Instruction 25%B The Computer in American Education 26%P 11-24 27%I John Wiley 28%C New York 29%D 1967 30%E D.D. Bushnell and D.W. Allen 31 32%A B.F. Skinner 33%T Why We Need Teaching Machines 34%J Harv. Educ. Review 35%V 31 36%P 377-398 37%O Reprinted in \fIEducational Technology,\fP ed. J.P. DeCecco, Holt Rinehart & Winston (New York, 1964) 38%D 1961 39 40%A B.W. Kernighan 41%T A Tutorial Introduction to the UNIX text editor 42%O Bell Laboratories internal memorandum 43%D 1974 44 45