"The classic that launched the environmental movement"--Cover.
Various printings list an anniversary on cover.
Includes bibliographical references (pages 301-355) and index.
Accelerated Reader Grades 9-12 11.5 19 SD Quiz 67632 English non-fiction.
Accelerated Reader AR UG 11.5 19.0 67632.
Reading Counts RC High School 10 25 Quiz: 10409 Guided reading level: NR.
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