R.A. Penfold

Audio Amplifier Projects Audio Amplifier Projects (PC Publishing)
by R.A. Penfold
November 1997
Print: $15.95

Practical Midi Handbook Practical Midi Handbook (PC Publishing)
by R.A. Penfold
Third Edition December 1995
Print: $15.95

Advanced Midi Users Guide Advanced Midi Users Guide (PC Publishing)
by R.A. Penfold
Second Edition December 1995
Print: $15.95