History 44 Land settlement Frontier and pioneer life 13 Ethnic relations 7 Land tenure 7 Emigration and immigration 6 Description and travel 5 more ... Discovery and exploration 5 Immigrants 5 Migration, Internal 5 Population 5 Race relations 5 Indians of North America 4 Irish 4 Social aspects 4 Social conditions 4 African Americans 3 Agriculture 3 Dissenters, Religious 3 Travel 3 Agricultural colonies 2 Bakhtiari (Iranian people) 2 Economic aspects 2 Government relations 2 Imperialism 2 Jews 2 Land claim associations 2 Land settlement patterns 2 Land use 2 Landlord and tenant 2 less ...