Threshold of extinction
Subtitle: an environmental values strategy ; the 5 R's process ; endangered species of Ontario
By: Frank Glew, Denis Freure.
Contributors: Freure, Denise.; Waterloo County Board of Education.
Edition: 3rd ed.
Publisher: Waterloo County Board of Education
Published: 1988
Place of publication: [Kitchener, Ont.]
Language: eng
Number of pages: 91
Subjects: Endangered species -- Ontario -- Study and teaching.; Environmental protection -- Study and teaching (Elementary); Environmental protection -- Study and teaching (Secondary); Wildlife conservation -- Study and teaching (Elementary); Wildlife conservation -- Study and teaching (Secondary)
Notes: Cover title.

Includes bibliographical references (p. 68-71).

Grade 7-12.