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Popular scientific lectures / by Ernst Mach ; translated by Thomas J. McCormack.

Popular scientific lectures / by Ernst Mach ; translated by Thomas J. McCormack.

On germinal selection as a source of definite variation / by August Weismann ; translated from the German by Thomas J. McCormack.

On germinal selection as a source of definite variation / by August Weismann ; translated from the German by Thomas J. McCormack.

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Active filters:

Popular scientific lectures / by Ernst Mach ; translated by Thomas J. McCormack.

Popular scientific lectures / by Ernst Mach ; translated by Thomas J. McCormack.

On germinal selection as a source of definite variation / by August Weismann ; translated from the German by Thomas J. McCormack.

On germinal selection as a source of definite variation / by August Weismann ; translated from the German by Thomas J. McCormack.