I am trying to locate a Mullard transistor projects hobby book (this is descriptive of the contents, but is not the title), but after extensive web searching have come up blank. I do not remember the title, but it was soft-cover large-format, stapled, perhaps 100 pages. I think the overall color on the cover was green. It may have been published by Mullard-Australia. UK publication data unknown. I received my copy of this book when I lived as a kid in New Zealand. I do remember some of the projects, and actually built one of them, which worked well for many years: a 3-volt Geiger counter that used a gamma-sensitive Philips GM tube and had a single-transistor oscillator and home-wound Ferroxcube high voltage transformer. I remember that the book also included an OC16 audio power amplifier project, and an OCP71 photo-transistor relay project. Any help in locating the book's name and publication information, and even a picture of the cover/table-of-contents would be greatly appreciated! Thank you! Alastair