Visitors, Foreign Foreign workers 3 Description and travel 2 History 2 Social life and customs 2 Attitudes 1 Employment in foreign countries 1 more ... Guerrillas 1 Hostages 1 Motion picture actors and actresses 1 Motion picture industry 1 Motion picture producers and directors 1 Periodicals 1 Railroad travel 1 Secret service 1 Statistics 1 Women spies 1 Women travelers 1 World War, 1914-1918 1 less ...