Bibliography and Citations
.
2009. .
2014. .
2003. .
2004. .
2005. .
2006. .
2007. .
2008. .
1997. .
1998. .
1995. .
1994. .
1993. .
1992. .
1999. .
1996. .
2000. .
2005. .
1991.
Trumpeter swans have a lot to be thankful for. Idhao Statesman. 21 November:C1.
.
1990. .
1990. .
1993. A tundra-steppe transition on Kathul Mountain, Alaska, U.S.A.. Arctic and Alpine Research. 21(3):296-304.
.
1989. .
1951. .
1993.