1.
|
Washington, DC : Resources for the Future, c2004.
|
2.
|
Washington, D.C. : National Academy Press, 1991.
|
3.
|
Cambridge, MA : CABI, 2007.
|
4.
|
London ; New York : Routledge, 1997.
|
5.
|
Abingdon [England] : Routledge, 2013.
|
6.
|
Washington, D.C. : Cato Institute ; Lanham, MD : Distributed to the trade by National Book Network, c2005.
|
7.
|
Santa Monica, CA : RAND Corporation, 2005.
|
8.
|
Washington, D.C. : Cato Institute ; Lanham, MD : Distributed to the trade by National Book Network, c2005.
|