xxvi, 318pp, in-text black and white graphs. Pictorial light card covers. 8vo. Lender applied semi-rigid protective plastic. Slightly sun-faded rear, shelf number label on spine (under protective cover), tape and residue on cover; light chipping to edges and wear to covers, corners curling. Text block edges just starting to tan. Lender's stamps, security device and markings inside covers and half-title pages; tape re-enforcement to hinges, top edge of pages wavy. Otherwise, internally neat, clean and tight.