Sage, E. M. (2009). A dubious science: Political economy and the social question in 19th-century France. Peter Lang.

Sage, Elizabeth M. A Dubious Science: Political Economy and the Social Question in 19th-century France. New York: Peter Lang, 2009.

Sage, Elizabeth M. A Dubious Science: Political Economy and the Social Question in 19th-century France. Peter Lang, 2009.