Zeff, Robbin Lee. Environmental Action Groups / Robbin Lee Zeff. - New York : Chelsea House, c 1994. - 112 p. : ill. ; 24 cm. - Earth at Risk. . Includes index. Bibliography : p. 104-05 ISBN: 0791015939, 0791016188 Subjects--Topical Terms: Green movement. Dewey Class. No.: 363.7/ Z28e