ONE major difference between Sinn's and Pfaelzer's historical interpretations of immigration to the Pacific coast of the United States during the 1850s and1860s

a) Briefly describe ONE specific historical difference between the internal ... States in the period 1910–1940 and the internal migration patterns in the period ... Changing racial and ethnic makeup of urban centers in North, Midwest, and West.

would not cooperate with each other voluntarily.

where is the diagram