1909. The Ecological Succession of Birds. Ann. Rep. Mich. Geol. Surv. for 1908, pp. 121-154.
Shelford, V. E.
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The standpoint of this paper is very much in harmony with that advanced in this book.
Case, E. C.
1905. Œcological Features of Evolution. Bull. Wis. Nat. Hist. Soc., Vol. III, pp. 169-180.
Wheeler, W. M.
1905. Ethology and the Mutation Theory. Science, N. S., Vol. XXI, pp. 535-540.
Flahault, C., and Schröter, C.
1910. Phytogeographical Nomenclature. Reports and Propositions. IIIᵉ Cong. Inter. de Botanique. Bruxelles, 1910. pp. 28 + x. Zurich.