"Étudiants noirs Activité politique États-Unis Philadelphie (Pa.) 1945-1990." . . . . . . . . . . . . . "Black students in the ivory tower : African American student activism at the University of Pennsylvania, 1967-1990" . "Black students in the ivory tower African American student activism at the University of Pennsylvania, 1967-1990" . "Black students in the ivory tower African American student activism at the University of Pennsylvania, 1967-1990"@en . . . . . . . . . . "History" . "History"@en . . . . "Mouvements étudiants États-Unis Philadelphie (Pa.) 1945-1990." . . "1900 - 1999" . .