000 00373nam a22001337a 4500
020 _a0-309-05550-4
082 _a388.049
_bNAT
100 _aN.T.B, N.R.C
_938535
245 _aTransportation research record No.1404
_cN.R.C, N.T.B
260 _aWashington
_bNational Academy Press
_c1993
300 _a100 p
526 _a0
_b0
_c0
_d388_049000000000000_NAT
942 _2ddc
_cBK
999 _c543154
_d543154