Hartz, C. & Carlson, S. (2002). Exploring your environment : group activities. Helper's guide. University of Minnesota Extension Service BU-07707.
This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.
Hartz, Carrie; Carlson, Stephan.
Exploring your environment : Group activities. Helper's guide.
Univeristy of Minnesota Extension Service.
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