Text ( visual ) : unmediated The shaping of environmentalism in America / Victor B. Scheffer. -- Seattle : University of Washington Press , c1991. -- x, 249 p. : ill. ; 24 cm. -- Includes bibliographical references and index (p. 231-249). -- ISBN 029597060X ; (BA12829258) ; https://ci.nii.ac.jp/ncid/BA12829258 Author Heading(s): Scheffer, Victor B.. -- Classification(s): LCC : HC110.E5 ; DC20 : 363.7/07/0973. -- Subject Heading(s): LCSH : Environmental policy -- United States -- History ; LCSH : Environmental protection -- United States -- History ; LCSH : Human ecology -- United States -- History