History 6,089 Politics and government 1,695 Description and travel 1,512 Histoire 816 Social conditions 777 Social life and customs 701 Frontier and pioneer life 605 Máis ... Foreign relations 564 Race relations 434 Economic conditions 397 Indians of North America 378 African Americans 366 Civilization 350 Politique et gouvernement 314 Travel 282 Discovery and exploration 275 Relations 253 Antiquities 226 Ethnic relations 184 Sources 179 History, Military 178 Publications by Graduates 177 Social aspects 169 Diplomatic relations 159 Relations extérieures 157 Descriptions et voyages 156 Pioneers 141 Indians of South America 133 Publications about Graduates 131 Colonies 126 menos ...