June 1975 Issue [Article] Harmonica bugs, cloaks, and silver boxes Adjust Share by G.J.A. (George J.A.) O’Toole, This article is only available as a PDF to subscribers. Download PDF Tags 20th century Eavesdropping Electronic surveillance Right of Privacy United States Wiretapping More from G.J.A. (George J.A.) O’Toole Adjust Share