1949. Reprint. 252 pages. No dust jacket. Orange cloth. Graphs and charts throughout. Pages have slight foxing, tanning and minor thumbing. Foxing more noticeable towards the start and end of the book. Previous owner's inscription to front endpaper. Boards have various small marks, scratches and heavy foxing. Corners are bumped and fraying. Spine ends are crushed and worn with splits starting to joints. Spine is noticeably sunned.