Rubaroe, G.T. Essential theory for the electronics hobbyist / [Book]. by G.T. Rubaroe. - Shepherds Bush road, London : Bernard Babani Pub. Ltd., 1977 - 118p. : ill. ; 18cm. - Bernards & Babani Press radio and electronics books ; no.228 . ISBN: 0900162694 Subjects--Topical Terms: Electronic apparatus and appliances.