International Union of Geological Society. (1985). Episodes,vol.8&9.
Chicago Edition CitationInternational Union of Geological Society. Episodes,vol.8&9. International Union of Geological Society, 1985.
MLA Edition CitationInternational Union of Geological Society. Episodes,vol.8&9. 1985.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.