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By: Jeffords, Michael R. - Illinois. Natural History Survey DivisionEdition:Publication info: Champaign, Ill, Illinois Natural History Survey, [1992]Volume: no. 13Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Activity programs Artenreichtum Biodiversity Illinois Juvenile literature Juvenile works Literature Study and teachingBHL Collections:
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By: Case, Laurie J. - Wissmann, Janet L. - Jeffords, Michael R. - Illinois. Natural History Survey DivisionEdition:Publication info: Champaign, Ill, Illinois Natural History Survey, [1988]Volume: no. 9Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Activity programs Control Curricula Ecology Entomology Environmental education Gypsy moth Illinois Insect pests Insekten Ökologie Pests Pflanzenschutz Schwammspinner Study and teachingBHL Collections:
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By: Jeffords, Michael R. - Hodgins, Audrey S. - Illinois. Natural History Survey DivisionEdition:Publication info: Champaign, Ill, Illinois Natural History Survey, [1995]Volume: no. 18Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Activity programs Biological control Pests Study and teaching Study and teaching (Middle school) Study and teaching (Secondary)BHL Collections:
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By: Jeffords, Michael R. - Hodgins, Audrey S. - Havera, Stephen P. - Illinois. Natural History Survey DivisionEdition:Publication info: Champaign, Ill, Illinois Natural History Survey, [1992]Volume: no. 14Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Activity programs Feuchtgebiet Middle west Natur Slides Study and teaching Wetland ecology WetlandsBHL Collections: