Description and travel History 336 Social life and customs 257 Journeys 93 Economic conditions 91 Social conditions 84 Natural history 77 Politics and government 72 Biography 64 Missions 52 Voyages and travels 48 Periodicals 39 Ethnology 38 Civilization 37 Early works to 1800 37 Pictorial works 37 Guidebooks 33 Geography 31 Aboriginal Australians 28 Travel 26 Frontier and pioneer life 25 Cities and towns 21 Diaries 21 Indians of South America 21 Physical geography 20 Antiquities 18 Communism 18 Discovery and exploration 18 Sources 18 Zoology 18