Smith, James Perrin
Lower Triassic ammonoids of North America - Washington, D.C. U.S. Geological Survey 1932 - pp. 1-198 láms.
AMMONOIDEA
TRIASICO
ESTADOS UNIDOS
Lower Triassic ammonoids of North America - Washington, D.C. U.S. Geological Survey 1932 - pp. 1-198 láms.
AMMONOIDEA
TRIASICO
ESTADOS UNIDOS