@book{UBHD-1055114, author={Heyerdahl, Thor}, title={The Ra expeditions}, edition={2. impr.}, publisher={Allen & Unwin}, address={London}, year={1971}, pages={334 S.}, language={eng}, isbn={0-04-572020-7 and 978-0-04-572020-0}, library={UB [Signatur: 76 B 4080]}, }