APA aipamena

Keller, A. C. (1937). Direct recording and reproducing materials for disk recording. Bell telephone system B-998.

Chicago Style aipamena

Keller, A. C. "Direct Recording and Reproducing Materials for Disk Recording." Bell Telephone System B-998 1937.

MLA aipamena

Keller, A. C. "Direct Recording and Reproducing Materials for Disk Recording." Bell Telephone System B-998 1937.

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