Dwight Cope. Edited by Floyd Dickey. Cope's Plastic Book. The Goodheart-Willcox Co., Inc., 1957, 1960, 1973.
Cope's Plastic is still around. Interestingly, they report on the website that in the late 40's and early 50's, they were dependent on hobbyists and industrial arts departments to keep them financially afloat. Back then, the industrial use of plastic was very limited.