1904. Sur les ‘vads’ et les sables maritimes de la mer du nord. Kon. Danske Vid. Selsk. Skrift., Bd. VII, R. II, pp. 48-56.
The sandy flats of the sea coast of Jutland and Holland are treated as a biotic association, and from a modern ecological standpoint.
Baker, F. C.
1910. The Ecology of the Skokie Marsh Area, with Special Reference to the Mollusca. Bull. Ill. State Lab. Nat. Hist., Vol. VIII, pp. 441-499.
A descriptive account of local molluscan associations near Chicago.
1911. The Molluscan Fauna of Tomahawk Lake, Wisconsin. Trans. Wis. Acad. Sci., Arts and Letters, Vol. XVII, pp. 200-246.
An associational study of molluscan succession. One of the very few of its kind.
Hancock, J. L.
1911. Nature Sketches in Temperate America, pp. 451. Chicago.
A discussion of the habitats of Orthoptera is given on pp. 317-418, and a classification of them on pp. 419-433, based upon the egg-laying sites.