"Rassenfrage." . . "Afro-Americans Bibliography." . . "Schwarze." . . "African Americans." . . "Noirs américains Bibliographie Bibliographie." . . "Negers." . . "African Americans Bibliography." . . "États-Unis. Noirs. Bibliographie." . . . . "USA." . . "Estats Units d'Amèrica" . . "Afroamericans Bibliografia." . . "Bibliographie." . . "The negro in the United States : a reasearch guide"@en . . . . . . . . . . "The Negro in the United States" . . "The Negro in the United States : A research guide" . . . . . "The Negro in the United States : a research guide"@en . "The Negro in the United States : a research guide" . . . "The Negro in the United States; a research guide" . "The Negro in the United States; a research guide"@en . . . . . "The negro in the United States : A research guide" . . . . . . . . "Bibliographical essay on social, economic, and cultural aspects of Negro life by a reference librarian, primarily intended for use in classes on Negro history."@en . . . "The negro in the United States : a research guide"@en . . "The negro in the United States : a research guide" . "The negro in the United States. A research guide" . . . "The Negro in the United States a research guide" . "The Negro in the United States a research guide"@en . . . . . . . . . . . . . . . . . "The Negro in the United States : a research guide, by Erwin K. Welsch" . "Bibliography"@en . "Bibliography" . . . "Schwarze." . . "Noirs américains Bibliographie." . .