River life Vie fluviale 24 HISTORY 17 History 17 Description and travel 16 Social life and customs 16 General 14 Manners and customs 14 Travel 14 State & Local 13 Histoire 12 Descriptions et voyages 11 Environmental conditions 8 Ecology 6 Human ecology 6 Mœurs et coutumes 6 History, Local 5 SOCIAL SCIENCE 5 TRAVEL 5 Canoes and canoeing 4 Conditions environnementales 4 River boats 4 Rivers 4 Bateaux à vapeur fluviaux 3 Effect of environment on 3 Human beings 3 Johnboats 3 Midwest (IA, IL, IN, KS, MI, MN, MO, ND, NE, OH, SD, WI) 3 Natural history 3 Natural resources 3