000 | 00515nam a2200145 a 4500 | ||
---|---|---|---|
005 | 20220228110540.0 | ||
035 | _aF8901000704617 | ||
084 | _aTRB REC 1244 1989 | ||
245 | _aTraffic and grade crossing control devices / Transportation- Research Board. | ||
260 | _aWashington, D.C. : TRB | ||
300 | _a72 p. | ||
440 | _aRecord ; 1244 / Transportation Research Board | ||
690 | _aTránsito - Signos y señales.Tránsito - Control. | ||
710 | _aNational Research Council. Transportation Research Board (E-.U.A.) | ||
999 |
_c56034 _d56034 |