| Registros del 1 al 4 de 4 encontrados |
1.- A devonian species of heliotiles from Nevada
Stumm, Erwin C.
Michigan: University of Michigan Press, 1954
C 468 - 20
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2.- Lower middle devonian phacopid trilobites from Michigan, Southwestern, Ontario, and the Ohio Valley
Stumm, Erwin C.
Michigan: University of Michigan Press, 1954
C 468 - 3
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3.- Species of the silurian rugose coral tryplasma from North America
Stumm, Erwin C.
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4.- Trilobites of the devonian traverse group of Michigan
Stumm, Erwin C.
Michigan: University of Michigan Press, 1953
C 468 - 5
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