共 9 条
[1]
American Society of Civil Engineers, 2009, REP CARD AM INFR
[2]
Federal Highway Administration, 2008, INCL BOTH URB RUR IN
[3]
Hoene C., 2009, RES BRIEF AM CITIES
[4]
Maryland Economic Development Corporation, 2009, SER A B OFF STAT
[5]
McNichol Elizabeth, 2010, RECESSION CONTINUES
[6]
National Conference of State Legislatures, 1999, NAT C STAT LEG APR 1
[7]
Pew, 2010, TRILL DOLL GAP UND S
[8]
Probitas Partners, 2009, INFR MARK REV I INV
[9]
Probitas Partners, 2009, INFR MARK REV I INV