Environmental economics & management : theory, policy, and applications / Scott J. Callan, Janet M. Thomas. Callan, Scott J. Thomas, Janet M. jt. aut. Environmental economics. 333.7 CAE Glossary: p. 553-559. Includes bibliographical references and index. Delhi ; Cengage Learning, 2013 (2015). 2013 (2015). 2013 Text xxxv, 588 p. : eng