Orvig, T. (1968). Current problems of lower vertebrate phylogency: Proceedings of the fourth Nobel Symposium.
Chicago Edition CitationOrvig, Tor. Current Problems of Lower Vertebrate Phylogency: Proceedings of the Fourth Nobel Symposium. 1968.
MLA Edition CitationOrvig, Tor. Current Problems of Lower Vertebrate Phylogency: Proceedings of the Fourth Nobel Symposium. 1968.
Warning: These citations may not always be 100% accurate.