MacKenzie, Ossian. <br/><br/>
Correspondence instruction in the United States  a study of what it is, how it functions, and what its potential may be 
Ossian MacKenzie, Edward L. Christensen [and] Paul H. Rigby. 
 - New York  McGraw-Hill  [1968] 
 - xv, 261 p.  illus. 
 - The Carnegie series in American education .
<br/><br/> Study sponsored by the American Council on Education and the National Commission on Accrediting. 
<br/><br/>Bibliography: p. 59-63. 
<br/><br/><label>LCCN: </label>68008663  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Correspondence schools and courses--United States.
<br/><br/><label>LC Class. No.: </label>LC5951  / .M3 1968 
<br/><br/><label>Dewey Class. No.: </label>374/.473