Interactions within ecosystems
By: author, Bob Ritter ; program consultant, Marietta <Mars> Bloch.
Contributors: Quanz, Ken.
Series: Nelson science & technology -- .7, Unit 5
Publisher: Nelson Thomson Learning
Published: 2000
Place of publication: Scarborough, Ont
Language: eng
Number of pages: 64
Subjects: Ecology -- Juvenile literature.; Human ecology -- Juvenile literature.
Genres: Juvenile literature.
Notes: Teacher's resource by Ken Quanz, Bob Ritter.

For use in grade 7.

CR

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