Helen J. Challand (Open Library)

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Helen J. Challand

Books by this Author

	Vanishing forests by Helen J. Challand Childrens Press, 1991
	Disappearing wetlands by Helen J. Challand Children's Press, 1992
	Experiments with chemistry by Helen J. Challand Childrens Press, 1988
	Experiments with magnets by Helen J. Challand Childrens Press, 1986
	Experiments with electricity by Helen J. Challand Childrens Press, 1986
	Plants without seeds by Helen J. Challand Childrens Press, 1986
	Science projects and activities by Helen J. Challand Childrens Press, 1985
	Activities in the physical sciences by Helen J. Challand Childrens Press, 1984
	Activities in the life sciences by Helen J. Challand Childrens Press, 1982
	Activities in the earth sciences by Helen J. Challand Childrens Press, 1982
	Earthquakes by Helen J. Challand Childrens Press, 1982
	Volcanoes by Helen J. Challand Childrens Press, 1983
	Science activities from A to Z by Helen J. Challand Childrens Press, 1963
	Volcanoes (New True Books: Nature (Paperback)) by Helen J. Challand Childrens Pr, September 1980 Paperback
	Experiments W/Chemistry by Helen J. Challand Children's Press (CT), December 1988 Paperback
	Earthquakes (New True Books: Nature (Paperback)) by Helen J. Challand Childrens Pr, June 1982 Paperback