1968. Revised Edition. 124 pages. No dust jacket. This is an ex-Library book. Black and green cloth with photographic black and white in text images throughout. Expected library inserts, stamps and inscriptions. Moderate tanning to pages with front endpaper missing and pen inscriptions to rear endpaper. Binding is loose. Boards have minor rubbing and visible bumping to corners. Heavier crushing to spine ends and fraying to cloth at corners and spine ends.