History 5,993 Politics and government 1,669 Description and travel 1,507 Histoire 815 Social conditions 773 Social life and customs 705 Frontier and pioneer life 605 more ... Foreign relations 560 Race relations 436 Economic conditions 392 Indians of North America 376 African Americans 369 Civilization 342 Politique et gouvernement 314 Travel 281 Discovery and exploration 270 Relations 248 Antiquities 220 Publications by Graduates 201 Ethnic relations 184 Sources 174 Social aspects 169 History, Military 167 Diplomatic relations 159 Relations extérieures 157 Descriptions et voyages 155 Publications about Graduates 155 Pioneers 141 Indians of South America 127 Manners and customs 121 less ...