![no cover found](https://literarybibliography.eu/themes/default/images/no_cover.png)
by:
Guttenfelder, David.
In: National geographic. - ISSN 1457-5981. - 2013 : 10, s.62-81
Journal article
In: National geographic. - ISSN 1457-5981. - 2013 : 10, s.62-81
Journal article