Cita APA

Ludvigsen, R. Upper Cambrian and Lower Ordoviciantrilobite Biostratigraphy of the Rabbitkettle Formation, Western District of Mackenzie / Rolf Ludvigsen. Toronto : ROM.

Citación estilo Chicago

Ludvigsen, Rolf. Upper Cambrian and Lower Ordoviciantrilobite Biostratigraphy of the Rabbitkettle Formation, Western District of Mackenzie / Rolf Ludvigsen. Toronto : ROM.

Cita MLA

Ludvigsen, Rolf. Upper Cambrian and Lower Ordoviciantrilobite Biostratigraphy of the Rabbitkettle Formation, Western District of Mackenzie / Rolf Ludvigsen. Toronto : ROM.