Keller, A. C. (1937). Direct recording and reproducing materials for disk recording. Bell telephone system B-998.
Chicago Stili AlıntıKeller, A. C. "Direct Recording and Reproducing Materials for Disk Recording." Bell Telephone System B-998 1937.
MLA AlıntıKeller, A. C. "Direct Recording and Reproducing Materials for Disk Recording." Bell Telephone System B-998 1937.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..