Lower middle devonian Phacopid Trilobites from Michigan, southwestern Ontario, and the Ohio Valley.

Benzer Materyaller

• Lower middle devonian Proetid Trilobites from Michigan, southwestern Ontario, and northern Ohio.
  Yazar:: Stumm, Erwin Charles
  Baskı/Yayın Bilgisi: (1953)
• Two new Species of Trilobites from the Middle Devonian Silica Shale of northwestern Ohio.
  Yazar:: Stumm, Erwin Charles
  Baskı/Yayın Bilgisi: (1966)
• Silicified Trilobites from the Devonian Jeffersonville Limestone at the Falls of the Ohio.
  Yazar:: Stumm, Erwin Charles
  Baskı/Yayın Bilgisi: (1966)
• Trilobites of the Devonian traverse group of Michigan.
  Yazar:: Stumm, Erwin Charles
  Baskı/Yayın Bilgisi: (1953)
• Check List of fossil invertebrates described from the middle Devonian rocks of the Thedford-Arkona Region of southwestern Ontario.
  Yazar:: Stumm, Erwin Charles
  Baskı/Yayın Bilgisi: (1958)