——. “The fluctuating climate of North America.” Geogr. J. 40, 1912, pp. 264, 392.
——. “The pulse of Asia.” Boston and New York, 1907.
——. “World power and evolution.” New Haven, 1919.
Pettersson, O. “Climatic fluctuations in historic and prehistoric time.” Svenska Hydrogr.-Biol. Komm. Skrifter, H. 5.
Rabot, Ch. “Essai de chronologie des variations glaciaires.” Bull. géogr. historique et descriptive, No. 2, 1902.
Brückner, E. “Klimaschwankungen seit 1700” ... Vienna, 1890.
Hildebrandsson, H. H. “Sur le prétendu changement du climat européen en temps historique.” Upsala, Nova Actae Regiae Soc. Sci. (4), Vol. 4, No. 5, 1915.
Brooks, C. E. P. “An historical notice of the variations of climate in Chile.” Washington, Dept. Agric., U.S. Weather Bureau, Monthly Weather Rev. 47, 1919, p. 637.