There are two library stamps (Perth Technical College): one on the front paste down and again on the title page. Both hinges have been reinfoced with acid free tape. The back paste down appears to have been covered by another piece of paper. It has been beautifully repaire and it is barely noticeable, including colour being identical to that of the back end paper. There are no internal markings and the binding is solid. The interesting part is that an Allen and Unwin labe has been used to cover the original Houghton Mifflin one. 246 pages, bibliography, glossary and index.