TY  - BOOK
AU  - Ruden,R.J.
ED  - United States.
TI  - Motorists? requirements for active grade crossing warning devices
U1  -  625.70973 
PY  - 1979///
CY  - Washington, D. C.
PB  - The Department
KW  - Highway engineering
KW  - United States
N1  - Bibliography : p. 256-257-258
ER  -