Subjects: History; Interdisciplinary education
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Subjects: History; Book industry; Bookbinding
Subjects: *River ecology; Commerce; HistoryMissouri River
Subjects: History; Evolutionary theories; Economics
Subjects: *Forests & forestry; History; Wood
Subjects: *Environmental sciences; History; Humanities
Subjects: *Environmentalism; *Environmental protection; HistoryUnited States; South Africa
Subjects: *Physiology; History; Anthropometry
Subjects: *Land use; History
Subjects: *Environmental sciences; History of ecology; HistoryEurope