Text ( visual ) : unmediated The eternal frontier : an ecological history of North America and its peoples / Tim Flannery. -- London : Penguin Books , 2007. -- 404 p., [8] p. of plates : ill. (some col.), maps ; 20 cm. -- (Penguin books). -- "Penguin science/history"-P. [4] of cover ; Includes bibliographical references (p. [383]-395) and index. -- ISBN 9780141026930 ; (BA82336594) ; https://ci.nii.ac.jp/ncid/BA82336594 Author Heading(s): Flannery, Tim F. (Tim Fridtjof). -- Classification(s): LCC : QH102 ; DC21 : 508.7. -- Subject Heading(s): LCSH : Natural history -- North America ; LCSH : Ecology -- North America