1961. Thirteenth Edition. 1594 pages. No dust jacket. Purple cloth with silver lettering. Fold out statistics table. Blue advertisement plates throughout. Pages are slight tanned with mild foxing throughout. Small folds to some pages. Small amount of marginalia to pages throughout. Heavy tanning and foxing to upper text block edge and moderate to other edges. Boards have moderate shelf-wear with bumping to corners and rubbing to surfaces. Moderate amount of various stains and markings all over. Sticker to rear board. Mild tanning to spine, which has moderate crushing and wear to head. Small tear to front joint.