Roland. Eroberer der Lufte - Zeppelin ihr Beherrfscher(Zeppelin Conquerer of the Air). Stuttgart, 1916. 6x8", colorful cover illustration, 160pp, illus, hardcover. About good +, some cover spotting, text clean and tight. Chapters begin with mythology of flight, progress through free balloons and then into Zeppelins used in WWI. German text.