"Sowjetunion." . . "Panama Canal (Panama)" . . "Soviet Union" . . "Panamakanal." . . "United States" . . . . . "The Panama Canal and Soviet imperialism : war for the world waterways" . . "The Panama canal and Soviet imperialism : war for the world waterways" . . . . . . . . . "The Panama Canal and Soviet imperialism war for the world waterways"@en . . . . . . . .