ISGS GeoActivities series :
activities and other resources for teaching geology, Focus: grades 4-12.
APA Citation
Illinois State Geological Survey., Illinois. Department of Natural Resources. (2000). ISGS GeoActivities series: activities and other resources for teaching geology, Focus: grades 4-12. Champaign, Ill.: Illinois State Geological Survey.
MLA Citation
Illinois State Geological Survey, and Illinois. Department of Natural Resources. ISGS GeoActivities Series: Activities And Other Resources for Teaching Geology, Focus: Grades 4-12. Champaign, Ill.: Illinois State Geological Survey, 2000.
Warning: These citations may not always be complete (especially for serials).