Warne, F. J. (1907). Facts about immigration: Being the report of the proceedings of conferences on immigration held in New York city, September 24 and December 12, 1906. [S.l.: s.n.].

Warne, Frank Julian. Facts About Immigration: Being the Report of the Proceedings of Conferences On Immigration Held in New York City, September 24 and December 12, 1906. [S.l.: s.n.], 1907.

Warne, Frank Julian. Facts About Immigration: Being the Report of the Proceedings of Conferences On Immigration Held in New York City, September 24 and December 12, 1906. [S.l.: s.n.], 1907.