Richards John F The Unending frontier A environmental history of early Modern World - Berkeley University of California Press 2003 - xiv;682p cm. - California World History Library. . Bibliography p623-660 ISBN: 0520230752 3285.00 Source: 3566, 18/03/2005, Efficient General Book Subjects--Topical Terms: Social Geography Dewey Class. No.: U475:(G:5).1.k, P3