Evolution

Faith and Fossils

Man's Place in the Universe A Study of the Results of Scientific Research in Relation to the Unity or Plurality of Worlds, 3rd Edition

The Coal Measures Amphibia of North America

Biology versus Theology

The Other Side of Evolution: Its Effects and Fallacy

The Ancestry of Modern Amphibia: A Review of the Evidence

Evolution

Essays on Darwinism

The Conditions of Existence as Affecting the Perpetuation of Living Beings

Evolution

Evolution

The Descent of Man

Darwinism and Race Progress

Evolution, Old & New