Electronic Project Building for Beginners by R A Penfold

How to Use Oscilloscopes and Other Test Equipment: 267 (BP S.) - Penfold, R. A.

Practical Electronic Model Railway Projects by R. A. Penfold (Paperback, 1996)

Practical Electronic Model Railway Projects by R. A. Penfold

Beginner's Guide to Modern Electronic Components: 285 (BP S.) - Penfold, R. A.

50 Projects Using IC CA3130 R.A. Penfold Bernards Babani BP223 Fifty Electronics

Electronic Projects for Guitar by Penfold, R. A. Paperback Book The Fast Free

Practical Opto Electronic Projects (BP),R. A. Penfold