1966. No edition stated. 473 pages. No dust jacket. This is an ex-Library book. Red cloth with gilt titles to spine. Rebound by library, with expected inserts, stamps and inscriptions. Volume 7. Separate index to rear. Various diagrams. Text block edges are decoratively speckled. Pages have slight foxing, tanning and minor thumbing. Faint creases to some pages. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards a little rubbed and marked overall. Gilt is bright. Boards are bowed. Book has a heavy forward lean. Spine is noticeably sunned.