"États-Unis" . . "Social problems." . . "United States" . . . . . . "Social problems, a study of present-day social conditions by Ezra Thayer Towne" . "Social problems a study of present-day social conditions"@en . . "Social Problems: a study of present-day social conditions"@en . "Social Problems: a study of present-day social conditions" . . "Social problems A study of present-day social conditions" . . . "Social problems a study of present day social conditions"@en . . . . "Social Problems" . . . "Social problems, a study of present-day social conditions"@en . "Social problems, a study of present-day social conditions" . . "Social problems"@en . . "Social Problems, etc. [Revised edition.]"@en . "Social Problems, etc. [Revised edition.]" . "Social problems; a study of present-day social conditions" . "Social problems; a study of present-day social conditions"@en . . . . . . . . . . . . . . . . . . . . . . . . . "Social problems : a study of present-day social conditions"@en . . "Social problems : a study of present-day social conditions" . "Social Problems, etc" . . . . . "1918 - 1932" . . "Problèmes sociaux." . .