History 497 Description and travel 249 Social life and customs 132 Politics and government 83 Frontier and pioneer life 77 Histoire 48 Juvenile literature 48 mer ... Social conditions 48 Antiquities 37 Travel 37 Guidebooks 36 Biography 35 African Americans 32 Civilization 31 Descriptions et voyages 27 Economic conditions 26 Cowboys 25 Mayas 25 Pictorial works 24 Natural history 22 History ; American Studies 21 Buildings, structures, etc 20 Gold discoveries 20 Foreign relations 18 Indians of Mexico 18 Pioneers 18 Discovery and exploration 17 Geschichte 17 Indians of North America 17 Automobile travel 15 mindre ...