4. Teaching by correspondence [1967]
5. New perspectives in university correspondence study [by] Charles A. Wedemeyer [and] Gayle B. Childs [1961]
10. Correspondence instruction, 1929-1930 [1929]
11. Correspondence instruction, 1928-1929 [1928]
12. Home study blue book [1928 - ]
13. Correspondence instruction, 1927-1928 [1927]
19. Correspondence courses, 1922-1923 [1922]
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