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Earth child : games, stories, activities, experiments & ideas about living lightly on planet earth / Kathryn Sheehan and Mary Waidner ; illustrated with original drawings by Angela...
by Sheehan, Kathryn.Subjects: '; “...Ecology Study and teaching (Elementary)...”
Ten-minute field trips : a teacher's guide to using the school grounds for environmental studies / by Helen Ross Russell ; illustrated by Klaus Winckelmann.
by Russell, Helen Ross, 1915-Subjects: '; “...Ecology Study and teaching (Elementary)...”