"Reciprocity Bibliography." . . "Tariff Bibliography United States." . . "United States" . . "United States Tariff Commission. Library." . . . . "Commerce Bibliography." . . . . . . . "Reciprocal trade : a current bibliography; selected list of references" . "Reciprocal trade : a current bibliography : selected list of references" . "Reciprocal trade : a current bibliography; selected list of references compiled as a W.P.A. project [Hauptbd.]" . . . . . . . . . . "Reciprocal trade a current bibliography; selected list of references"@en . . "Reciprocal trade: a current bibliography; selected list of references" . . . . . "Reciprocal trade; a current bibliography; selected list of references" . . . . . "Bibliography" . "Bibliography"@en . . . . . . "Reciprocal trade : a current bibliography ; selected list of references compiled as a W.P.A. project under the supervision of Cornelia Notz, librarian, U.S. Tariff commission, with the assistance of Sadie Jarvinen and others of the library staff"@en .