Not exactly light fluffy reading, but a detailed breakdown of how to build the old 03, plus brief chapters at the end on the Lewis, P17 etc. Hard to find book normally, god bless the Internet Archive
h ttp://archive.org/stream/cu31924012809897#page/n329/mode/2up
h ttp://archive.org/stream/cu31924012809897#page/n329/mode/2up




















































