1962. Reprinted. 191 pages. Pictorial dust jacket over brown cloth. Black and white diagrams throughout by F. Nellis Mann. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Minor pencil inscriptions to front free endpaper. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Unclipped jacket has light edge wear with minor tears, chipping and creasing.