No Edition Remarks. Unpaginated. Illustrated paper covers. Preface says second edition, presumed 1969. Black and white illustrations throughout. Pages are bright and clear with mild foxing and tanning to text block edges and reverse of covers. Hinges are lightly cracked with staples visible but covers remain firmly attached. Paper covers have light edge-wear and corner curling with mild staining, tanning and scuffing overall. Spine has minor rolling and creasing with slight staining from staples.