TY - BOOK T1 - Middle cambrian stratigraphy and faunas of the Canadian rocky mountains T2 - Smithsonian Miscellaneous Colections ; A1 - Rasetti, Franco PP - Washington, D. C PB - Smithsonian Institution YR - 1951 UL - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dun.5061 OP - 277 ER -