Ortega, G. (2005). Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana margin (Eastern Cordillera, NW Argentina). Universitat de Barcelona.
Chicago Style (17th ed.) CitationOrtega, G. Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana Margin (Eastern Cordillera, NW Argentina). Universitat de Barcelona, 2005.
MLA (9th ed.) CitationOrtega, G. Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana Margin (Eastern Cordillera, NW Argentina). Universitat de Barcelona, 2005.
Warning: These citations may not always be 100% accurate.