Sinclair, Ian Robertson. Beginner's guide to audio / Ian R. Sinclair. - London : Newnes Technical Books, c1977. - 184 p. : ill. ; 19 cm. Includes index. ISBN: 0408002743 Subjects--Topical Terms: Audio-visual equipment.Sound--Equipment and supplies. Dewey Class. No.: 621.384136 / SIB 1977