Here are a couple more. The "Drawing Requirements Manual" which shows a lot of examples of drawings suitable for military vendors. They have, for instance, how to draw and present a wiring harness.
An older copy of "Machinery's Handbook" has a good section on drawing sizes and text height etc. They also spell out how to check drawings in a formal way.
My favourite is Engineering Drawing and Design by C.H Jensen. This book is a treasure trove and was a staple of every high school and college drafting program here in Canada. Library of Congress # 68-20742.
You can probably pick up a used one on EBay.
Good luck with your efforts!
The ''Engineers Black Book'' can be a handy reference.