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2. Nature and structure of the climax;Clements;J. Ecol.,1936
3. The ecological relations of the vegetation on the sand dunes of Lake Michigan;Cowles;Bot. Gaz.,1899
4. The physiographic ecology of Chicago and vicinity;Cowles;Bot. Gaz.,1901
5. The causes of vegetative cycles;Cowles;Bot. Gaz.,1911