Text in periodical Besinger, Charles. – «Electronic tuneup». – E.A.T. /L.A. survey. – No. 7 (Jan. 1971). – P. 5.
Text in periodical Besinger, Charles. – «The great video revolution». – E.A.T. /L.A. survey. – No. 5 (Summer 1970). – P. 11.