Offering these nine International Correspondence workbooks on Strength of Materials and Materials of Construciton, published by the International Textbook Company. Strength of Materials includes three booklets, published 1944; Materials of Construction - one booklet published 1955. 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.