GUE
SPATHIAN (LOWER TRIASSIC) AMMONOIDS FROM WESTERN USA (IDAHO, CALIFORNIA, UTAH AND NEVADA)
Jean Guex
Alexandre Hungerbühler
James F. Jenks
Luis O’Dogherty
Viorel Atudorei
David G. Taylor
Hugo Bucher
Annachiara Bartolini
Mémoire de Géologie (Lausanne), n°49, 2010
about 16 MB
the contributing authors are dyed-in-the-wool experts on the Triassic
@andreas