1965. First Edition. 333 pages. This is an ex-Library book. Pictorial jacket over blue cloth. Contains some black and white graphs. Expected library inserts, stamps and inscriptions. Pages are lightly tanned, but text remains clear. Binding is firm. Boards have minimal edgewear. Minor crushing to spine ends. A few small white marks to front board. Unclipped jacket. Light tanning to all surfaces. Mild rubbing to exterior. Minor tearing to edges, most noticeable to spine ends.