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Subjects
Ecology, History, Natural history, Rain forests, Agricultural Workers' Diseases, Agricultural workers' diseases, Botany, Botany, juvenile literature, Climatic changes, Deforestation, Description and travel, Ecology, juvenile literature, Exhibitions, Floods, Forest conservation, Hydraulic engineering, Hydraulics, Iowa Institute of Hydraulic Research, Iowa, social life and customs, Juvenile Environmental Studies, Juvenile literature, Landscape, Landscapes, Loess Hills (Iowa and Mo.) in art, Medicine, RuralPlaces
Iowa, Loess Hills (Iowa and Mo.), United States, Boulder County, Colorado, Loess Hills (Iowa and Mo.)), Nebraska, TropicsTime
20th centuryID Numbers
- OLID: OL232649A
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September 7, 2008 | Edited by RenameBot | fix author name |
April 1, 2008 | Created by an anonymous user | initial import |