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

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

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