@conference{vlker1970microphone, title = {Microphone Recordings for Radio and TV When Loudspeaker Equipment is Simultaneously Used for an Audience}, author = {Völker, Ernst-Joachim}, booktitle = {Audio Engineering Society Convention 38}, month = {May}, year = {1970}, url = {https://www.aes.org/e-lib/browse.cfm?elib=1309} }