Cooke, David C. Dirigibles that made History. New York, Putnam, 1962. Much like a "Jane's" with 37 airships in a facing page format (full page photo, facing page description). 72pp, oblong 9.5x8.5", dust jacket, very good. Covers a number of obscure and little-known airships, especially some of the pre-WWI. A very useful reference.