Gupta, RG. Audio and video systems : principles, maintenance and troubleshooting / RG Gupta. - 2nd ed. - New Delhi ; Tata McGraw Hill, c2010. - xvi, 360 p. : ill. ; 23 cm. ISBN: 9780070699762 Subjects--Topical Terms: Electrical & electronics engineering.Microphones. Dewey Class. No.: 621.3897