APA Citation

Ludvigsen, R. The Ordovician Trilobite Pseudogygites Kobayashi in Eastern and Arctic North America / Rolf Ludvigsen. Toronto : ROM.

Chicago Style Citation

Ludvigsen, Rolf. The Ordovician Trilobite Pseudogygites Kobayashi in Eastern and Arctic North America / Rolf Ludvigsen. Toronto : ROM.

MLA Citation

Ludvigsen, Rolf. The Ordovician Trilobite Pseudogygites Kobayashi in Eastern and Arctic North America / Rolf Ludvigsen. Toronto : ROM.

Warning: These citations may not always be 100% accurate.