by Charles D. Walcott
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Cambrian Geology and Paleontology
Cambrian geology and paleontology
Second contribution to the studies on th...
On the Cambrian faunas of North America
Cambrian trilobites
Pre-Cambrian Igneous Rocks of the Unkar ...
Catch and Release
Evolution and morphology of the trilobit...
Evolution and morphology of the Trilobit...
Cambrian Merostomata
Revision of the suborder Synziph osurina...
Middle Cambrian branchiopoda, malacostra...