@conference{vanderkooy1981polarity, title = {Polarity and Phase Standards for Analog Tape Recorders}, author = {Vanderkooy, John and Lipshitz, Stanley P.}, booktitle = {Audio Engineering Society Convention 69}, month = {May}, year = {1981}, url = {https://www.aes.org/e-lib/browse.cfm?elib=11959} }