A study of the homosexuals in Berlin as a sample of the grouping of population in the large city. (V, 1, 3; VII, 5.)

Hooker, G. E. “City-Planning and Political Areas,” Nat. Mun. Rev., VI (May, 1917), 337–45. (IV, 3; V, 1, 4, 5; VI, 7.)

The London Society. The London of the Future (New York and London, 1921).

An excellent view of the processes bringing about the allocation of the population and the trend of growth of the city from the core pressing outward toward the periphery. (II, 3; III, 1, 5, 6; IV; V; VI; VII; VIII, 1, 2, 3; IX, 1, 2, 3, 4.)

Ripley, W. Z. “Racial Geography of Europe,” Popular Science Monthly, LII (1898), 591–608; XIV, “Urban Problems.” See also his “Races of Europe,” chap. xx, on “Ethnic Stratification and Urban Selection.” (V, 3.)

Salten, Felix. Wiener Adel, Vol. XIV in “Grossstadt Dokumente” (Berlin, 1905).

Shows the local grouping of the nobility in the large European city. (IX, 4.)

Schmid, Herman. City bildung und Bevölkerungsverteilung in Grossstädten: Ein Beitrag zur Entwicklungsgeschichte des modernen Städtewesens (München, 1909).

Shows that the normal process of growth of the city is by emptying at the center, and redistributing its population around the periphery. (Compare Mark Jefferson, “The Anthropography of Some Great Cities: A Study in Distribution of Population,” Bull. Amer. Geog. Soc., XLI (1909), 537–66. (VII, 4, 5.))

Williams, James M. An American Town: A Sociological Study (New York, 1906).