1965. Revised and Reprinted Editon. 191 pages. Green photographic dust jacket over brown cloth boards with gilt lettering to spine. Black and white diagrams throughout. Binding remains firm. Crinkling to pages at gutters. Pages are moderately tanned throughout. Occasional foxing. Boards have mild edge wear with slight rubbing to surfaces. Crushing to spine ends. Tanning to spine and edges. Gilt lettering is darkened slightly. Book has a slight forward lean. Unclipped jacket has light edge wear with minor tears and chipping. Mild rubbing and marking. Tanning to spine and edges. Huge stain to back of jacket.