"Diplomatic relations." . . "Panama" . . "Panama." . "Panama, Canal de." . . "Echanges. Canal Panama." . . "Etats-Unis. Monroë. Doctrine." . . "United States" . . "United States." . "Panama Canal (Panama)" . . "Nicaragua canal." . . "Monroe doctrine." . . "Panamá, Isthme de." . . "Nicaragua" . . "Canals, Interoceanic." . . "Monroe, Doctrine de." . . "Caribbean Area" . . "Caribbean Area." . . . "Nicaragua Canal (Nicaragua)" . . "Panama canal." . . "États-Unis" . . . . . . . . . . . . "The Isthmian hishway. A review of the problems of the Caribbean" . . . . . "The isthmian highway a review of the problems of the caribbean" . . . . . . . . "The Isthmian highway : a review of the problems of the Caribbean"@en . "The Isthmian highway : a review of the problems of the Caribbean" . . . "The Isthmian highway [a review of the problems of the Caribbean] with illus. and appendices"@en . . . "The Isthmian highway : a review of the problems of the Caribbean : With illus. and appendices"@en . . . . . . . . . . . "The Isthmian highway a review of the problems of the Caribbean" . . "The Isthmian highway a review of the problems of the Caribbean"@en . . . . "The Isthmian highway" . . . "The Isthmian highway"@en . . . . . "The Isthmian Highway. A review of the problems of the Caribbean ... With illustrations, etc"@en . "The Isthmian highway; a review of the problems of the Caribbean"@en . . "The Isthmian highway; a review of the problems of the Caribbean" . . . . . . . "The Isthmian Highway : a review of the problems of the Caribbean" . . "The Isthmian Highway"@en . . "Panama Canal." . .