1969. Fourth Edition. 304 pages. Illustrated dust jacket over beige cloth. Spanish text. Moderate foxing and tanning to pages and text block edges. Binding remains firm. Boards have minor corner bumping and edgewear with mild tanning and scuffing overall. Spine has light tanning with soft crushing to ends. Unclipped dust jacket with minor rubbing, chipping and tearing to edges. Moderate tanning and scuffing overall.