James, Edmund J. “The Growth of Great Cities,” _Ann. Amer. Academy_, XIII (1899), 1–30. (VII, 2, 3.) Traces the growth of the cities and the genesis of the problems connected with it. Jefferson, Mark. “Great Cities of the United States in 1920,” _Geog. Rev._, XI (July, 1921), 437–41. Martell, P. “Die Bevölkerungsentwicklung der Stadt Berlin,” _Allgemeines Statistisches Archiv_, X (1917), 207–15. (VII, 3; VIII, 1.) Püschel, Alfred. _Das Anwachsen der Deutschen Städte in der Zeit der mittelalterlichen Kolonialbewegung_ (Berlin, 1910). Contains fifteen city plans. Traces the growth of cities in the medieval period and the changes in city structure. (II, 2; VII, 2.) Ridgley, D. C. “Sixty-eight Cities of the United States in 1920,” _Jour. Geog._, XX (February, 1921), 75–79. One of a series of postcensus-report analyses of the growth of the urban population. Roth, Lawrence V. “The Growth of American Cities,” _Geog. Rev._, V (May, 1918), 384–98. Holds that the growth of the cities of the United States has passed through four periods, each of which in its turn was the response to the commercial and industrial development of a new geographical region. Distinguishes between site and situation in city growth, and is here concerned mainly with general situation as a contributory influence. (III, 2, 3, 4.) Sedlaczek. “Die Bevölkerungszunahme der Grossstädte im XIX Jahrhundert und deren Ursachen,” _Report of the Eighth International Congress of Hygiene and Demography_ (Budapest, 1894). (VII, 3; VIII, 1; X, 1.) United States Bureau of the Census. _A Century of Population Growth_ (Washington, 1909). (VII, 3; VIII; X, 2.) United States Bureau of the Census. _Population: Fourteenth Census of the United States_ (3 vols.; Washington, 1920). (VII, 3; VIII, 1, 2; IX, 1; X, 2.) Van Cleef, E. “How Big Is Your Town?” _American City_, XVII (November, 1917), 471–73. Weber, Adna Ferrin. _The Growth of Cities in the Nineteenth Century: A Study in Statistics_, “Columbia University Studies in History, Economics, and Public Law” (New York, 1899). Besides being the most important book on the growth of the city from a statistical standpoint, it contains many other features of great value to the student of the city, especially of the influence of the urban environment on the population. (VII, 2, 3; VIII.) “Why Cities Grow,” _Literary Digest_, LVIII (August 17, 1918), 22–23. Zahn, F. “Die Volkszählung von 1900 und die Grossstadtfrage,” _Jahrbuch für Nationalökonomie und Statistik_, XXCI (1903), 191–215. (VII, 3.)