Não informado. (1955). Educators guide to free tapes, scripts and transcriptions. Educators Progress Service.
Chicago-viite (17. p.)Não informado. Educators Guide to Free Tapes, Scripts and Transcriptions. Randolph, Wis: Educators Progress Service, 1955.
MLA-viite (8. p.)Não informado. Educators Guide to Free Tapes, Scripts and Transcriptions. Educators Progress Service, 1955.
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