Daily, Gretchen C. The new economy of nature : the quest to make conservation profitable / Gretchen C. Daily and Katherine Ellison. - Washington [D.C.] : Island Press/Shearwater Books, c2002. - 260 p. ; 24 cm. Includes index. Includes bibliographical references. ISBN: 1559631546 (pbk.) Subjects--Topical Terms: Nature conservation--Economic aspects.