The Blacks in America, 1492–1977: A Chronology & Fact Book by Irving J. Sloan; The Russians in America, 1727–1975: A Chronology & Fact Book by Vladimir Wertsman; The Chicanos in America, 1540–1974: A Chronology & Fact Book by Richard A. Garcia; The American Indian, 1492–1976: A Chronology & Fact Book by Henry C. Dennis

Cridland, N. C. (1977). The Blacks in America, 1492–1977: A Chronology & Fact Book by Irving J. Sloan; The Russians in America, 1727–1975: A Chronology & Fact Book by Vladimir Wertsman; The Chicanos in America, 1540–1974: A Chronology & Fact Book by Richard A. Garcia; The American Indian, 1492–1976: A Chronology & Fact Book by Henry C. Dennis. Indiana Magazine of History. Retrieved from https://scholarworks.iu.edu/journals/index.php/imh/article/view/10057