Apparatus for studying the principles of electron physics.
Student development and exercising of electron physics principles by designing, assembling, operating and studying electron and ion devices
David, D. R.↗
Engineering topics
David, D. R.
Publications and source records attributed to David, D. R..
High-vacuum system for teaching and research.
High vacuum system of low cost noting operating principles, layout, construction, operating sequences, performance and simplicity
David, D. R.↗