Foreign economic relations -- 3 Foreign relations -- 3 Economic conditions -- 2 Relations -- 2 Adddress, essays, lectures -- 1 Address, essays, lectures 1 Address, essays, lectures -- 1 more ... Alien labor, Mexican -- 1 Aliens, Illegal -- 1 American Border Region -- 1 Boundaries -- 1 Case Studies 1 Case studies 1 Commerce -- 1 Congress 1 Congress -- 1 Economic aspects 1 Economic policy -- 1 El Chamizal (Mexico and Tex.) 1 Emigration and immigration -- 1 Employment -- 1 Environmental conditions -- 1 Foreign econoic relations -- 1 Foreign relation -- 1 History 1 Industries -- 1 Industry and State -- 1 Industry and state -- 1 Investments, American -- 1 Mexican -- 1 less ...