Weiss, N. J. From Black separatism to interracial cooperation: The origins of organized efforts for racial advancement, 1890 - 1920 / Nancy J. Weiss. Twentieth-century america : recent interpretations.(1972).

Weiss, Nancy J. "From Black Separatism to Interracial Cooperation: The Origins of Organized Efforts for Racial Advancement, 1890 - 1920 / Nancy J. Weiss." Twentieth-century America : Recent Interpretations.(1972) .

Weiss, Nancy J. "From Black Separatism to Interracial Cooperation: The Origins of Organized Efforts for Racial Advancement, 1890 - 1920 / Nancy J. Weiss." Twentieth-century America : Recent Interpretations.(1972), .