Sass, Rudolf. Flugbild Deutschland : [Album] / Rudolf Sass ; Otl Aicher. - S. l. : Lufthansa, 1968. - 166 S. : Karte ; col. ill. ; 30 cm. - 91(42)(NLA) . Subjects--Topical Terms: Aerial views --Germany Universal Decimal Class. No.: 91(42)(NLA)