@book{53140,
	author = {Dufau, P. A.},
	title = {De la méthode d'observation dans son application aux sciences morales et politiques / },
	editor = {Imp. P.A. Bourdier)},
	publisher = {Ve. Jules Renouard, etc, },
	year = {1866 (},
	address = {Paris : }
}