Livadary, J P.(1939). Unidirectional Microphone Technic*--. Journal of the Society of Motion Picture Engineers, 32(4), 381-389. doi:10.5594/j16558
MLA CitationLivadary, J. P. "Unidirectional Microphone Technic*--". Journal of the Society of Motion Picture Engineers, 32.4 ( 1939 ): 381-389.
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