Offering these nine International Correspondence workbooks on Tool Design, Elements of Mechanics, and Link Mechanisms, published by the International Textbook Company. Tool Design includes six booklets, booklet part one published 1958, booklets part 2-6 published 1936; Elements of Mechanics - 2 booklets part one and two published 1943; and Link Mechanisms edition 1 - one booklet, published 1943. Light blue soft paper covers, good+ condition, no tears or scribbling, light age toning. Pages are good++ condition, no tears, stains, or scribbling (some light pencil underlinings here and there - does not affect reading). Lots of drawings and illustrations throughout. Nice reference books.