AASHTO 1993
BLS 2010a
BLS 2010b
CEQ 1997
CEQ 2010
DOC 2010
DOC 2011
DOE 1994
DOE 1997a
DOE 1997b
DOE 2002
DOE 2003a
DOE 2003b
DOE 2008
DOE 2011
DOI 1986
DOT 2006
EPA 2003
EPA 2006
EPA 2008
EPA 2009
EPA 2010a
EPA 2010b
EPA 2010c
ICC 2000
IPCC 2007
ITE 2003
Johnson 2003
Kleinfelder 2007a
Kleinfelder 2007b
Kleinfelder 2010a
Kleinfelder 2010b
LANL 2000
LANL 2006
LANL 2007
LANL 2009
LANL 2010
LANL 2011a
LANL 2011b
National Research Council 2000
NRC 1977
NRC 1998
NRC 2000
PNNL 2007
Saricks and Tompkins, 1999
SDDCTEA 2006
SNL 2009
UMTRI 2003
USAF 2003
Valencia 2010
Yuan et al. 1995