Lehmann Luftfchiffcapitan Urnst A 'Auf Luftpatrouille Und Weltfahrt', Berlin 1936, original illustrated front cover, German gothic text, sepia plates, leather spine and gilt, facsimile signature and portrait frontispiece; 'The National Geographic Magazine', June 1930, Volume LVII No.6, section devoted to Graf-Zeppelin First Round-The-World Voyage written by Hugo Eckener