An introduction to digital electronics : theory, instruments and computers / Rowe, Jamieson. Digital counters. TK7872.C7 R66 621.381 ROI Based on a series of articles previously published in Electronics Australia. Includes bibliographies. Rosebery, N.S.W. : Sungravure Pty., 1967. 1967. 1967 Text 104 p. : eng