Manuel G. Gonzales is Professor of History at Diablo Valley College and adjunct professor of history at California State University, East Bay. He has also been a visiting professor of Chicano history at the University of California, Berkeley. His publications include Andrea Costa and the Rise of Socialism in the Romagna (Rowman and Littlefield, 1981) and Mexicanos: A History of Mexicans in the United States (University Press of America, 1980).