<secondary-title/> </titles> <pages/> <volume/> <number/> <keywords> <keyword>Trilobita</keyword> <keyword>Agnostida</keyword> <keyword>Latest Cambrian-earliest Ordovician</keyword> <keyword>Northwestern Argentina</keyword> <keyword>Biostratigraphy</keyword> </keywords> <dates> <year/> <pub-dates> <date>2003</date> </pub-dates> </dates> <abstract/> </record> </records> </xml>

Tortello, M.F. <secondary-title/> </titles> <pages/> <volume/> <number/> <keywords> <keyword>Trilobita</keyword> <keyword>Agnostida</keyword> <keyword>Latest Cambrian-earliest Ordovician</keyword> <keyword>Northwestern Argentina</keyword> <keyword>Biostratigraphy</keyword> </keywords> <dates> <year/> <pub-dates> <date>2003</date> </pub-dates> </dates> <abstract/> </record> </records> </xml>