1944 Paperback 300 page War Department Education Manual. "Mechanical Drawing EM 960" by Thomas E. French and Carl L. Svensen. United States Armed Forces Institute, Madison Wisconsin.
Freshman year at Loomis but also some of this showed up in Jr. High shop class. A representative text. I was just too sloppy/splotchy for this stuff. Mr. Shimkus was the teacher. Date is approximate.