Teaching by correspondence
Erdos, Renée F.
Teaching by correspondence Renée F. Erdos. - London Paris Longmans Unesco 1967. - iii-xvii, 218 p. illus. (incl. forms.) maps, facsims., tables, diagrs. - Unesco source books on curricula and methods, no. 3 .
Bibliography: p. 213-214.
68071024
B67-21120
Correspondence schools and courses
LC5915 / .E7
370.7/1/54
Teaching by correspondence Renée F. Erdos. - London Paris Longmans Unesco 1967. - iii-xvii, 218 p. illus. (incl. forms.) maps, facsims., tables, diagrs. - Unesco source books on curricula and methods, no. 3 .
Bibliography: p. 213-214.
68071024
B67-21120
Correspondence schools and courses
LC5915 / .E7
370.7/1/54