1968. 3rd Edition. 248 pages. No dust jacket. Blue cloth. Pages are lightly tanned and thumbed at the edges, with light foxing. Binding has remained firm. Boards are a little rub worn, slight shelf wear to corners, spine and edges. Corners are a little bumped. Spine ends are mildly crushed. Light tanning to spine and edges. Book has a forward lean. Book has a forward lean.