1977. Corrected Edition. 105 pages. Stapled pamphlet with no cover. Contains fold-out diagram to rear. Pages are bright, with light tanning to text block edges. Moderate dog-eared corners, with a few nicks and rub marks along text block edge. Occasional thumb-marking present throughout. Fold-out map is bright and clear with slight tanning to edges. Outer pages have light tanning to edges with moderate surface and edge wear, and curling to corners. Water drops on front page.