(1941). Free and Inexpensive Learning Materials. Nashville, Tennessee: George Peabody College for Teachers.
Trích dẫn kiểu ChicagoFree and Inexpensive Learning Materials. Nashville, Tennessee: George Peabody College for Teachers, 1941.
Deismireacht MLAFree and Inexpensive Learning Materials. Nashville, Tennessee: George Peabody College for Teachers, 1941.
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