File:Simple Electronics, Ladybird book, 1979.jpg

Simple Electronics, Learnabout Series, by G.C. Dobbs and illustrated by Roland Berry, Ladybird, 1979.

https://www.americanradiohistory.com/Archive-Bookshelf/Author-Groups/G.C.Dobbs/Learnabout...%20Simple-Electronics-Dobbs.pdf