1977. No edition remarks. 191 pages. Pictorial dust jacket over green cloth. Black and white photographs and diagrams. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have mild shelf wear with light rubbing and corner bumping. Some mild marking and tanning. Clipped jacket has light edge wear with minor chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine. Some rubbing and water marking.