Ninth census, U.S., 1870 Instructions to assistant marshals, Act of May 23, 1850.

Washington, D.C. : US GPO, 1870

Important points on U.S. census

Washington : [Bureau of the Census], 1909

Census Office and coordination of statistics reply of Director of Census to inquiries of Interdepartmental Statistical Committee.

Washington : U.S. G.P.O., 1909

Plan of inquiry into history and present condition of fisheries of U.S

Washington, D.C. : US GPO, 1879