Butts, K.H.; Turner, C. W.; Jasparr, C. (September 2003). "Environmental Security Cooperation"(PDF). Center for Strategic Leadership, U.S. Army War College, Carlisle, Pennsylvania. Archived from the original(PDF) on 2007-06-26.
Butts, K.H.; Turner, C. W.; Jasparr, C. (September 2003). "Environmental Security Cooperation"(PDF). Center for Strategic Leadership, U.S. Army War College, Carlisle, Pennsylvania. Archived from the original(PDF) on 2007-06-26.