Corynexochida and Ptychopariida (Trilobita, Arthropoda) of the Ehmaniella Biozone (Middle Cambrian), Utah and Nevada
Published in Contributions In Science (Los Angeles), in 1994, in volume 446, pages 1-137
Date published:1994
Published in Contributions In Science (Los Angeles), in 1994, in volume 446, pages 1-137
Date published:1994