Richards, John F. The Unending frontier : an environmental history of the early modern world / John F.Richards. - Berkeley : University of California Press, 2005. - 682p PBK ISBN: 9780520246782 Standard No.: 6163 [old SOUL v1.0 record id] Subjects--Topical Terms: Nature - Effects of human beingHuman Ecology Dewey Class. No.: 304.2 / R 39 u