WILLS Ian Economics and the environment A signalling and incentives approach - 2 - New Delhi Viva Books 2007 - xii, 388p cm. ISBN: 1741145767 420.75 Source: 549, 13/03/2008, PIONEER BOOK DISTRIBUTORS General Book Subjects--Topical Terms: Economics Dewey Class. No.: X: (G: 55), P7