a study of what it is, how it functions, and what its potential may be MacKenzie, Ossian. creator Christensen, Edward L. joint author. Rigby, Paul H. joint author. American Council on Education National Commission on Accrediting text bibliography nyu New York McGraw-Hill [1968] 1968 monographic eng

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xv, 261 p. illus. Ossian MacKenzie, Edward L. Christensen [and] Paul H. Rigby. Study sponsored by the American Council on Education and the National Commission on Accrediting. Bibliography: p. 59-63. Correspondence schools and courses United States LC5951 .M3 1968 374/.473 68008663 681122 20160527194320.0 20813