Educational Service, nti Electronics Dept., Chadderton, Oldham, Lancashire and Dundee, Scotland Miscellaneous brochures (1969-1970) on:
- D357/1 Simple Valve, Oscilloscope, Transistor Measurements
- D357/2 Educational Projects in Electronics
- D357/3 Educational Electronic Experiments
- D357/4 Introducing transistors, integrated circuits and thyristors
- D357/5 C. N. G. Matthews, A Programmed Book on Semiconductor Devices, 1970 Ferranti.