Guests Come to Stay: The Effects of European Labor Migration on Sending and Receiving Countries. Edited by Rosemarie Rogers. (Boulder, CO: Westview Press, 1985. Pp. xiii + 344. $25.50.) - The Unwanted: European Refugees in the Twentieth Century. By Michael R. Marrus. (New York: Oxford University Press, 1985. Pp. xii + 414. $24.95.)