History 3,060 Biography 1,323 World War, 1939-1945 1,261 Politics and government 1,253 Campaigns 643 Juvenile literature 341 Foreign relations 314 Description and travel 221 United States 216 Malaysia 182 Social conditions 180 Civilization 175 World War, 1914-1918 175 Economic conditions 148 World war, 1939-1945 145 History, Military 138 Personal narratives, American 129 Vietnam War, 1961-1975 127 Aerial operations 123 Presidents 118 Politicians 109 World politics 107 Pictorial works 104 Vietnamese Conflict, 1961-1975 104 Personal narratives 102 Social life and customs 98 Naval operations 96 Terrorism 96 World War 94 Regimental histories 89