| 000 | 00525nam a2200145 a 4500 | ||
|---|---|---|---|
| 005 | 20220228110805.0 | ||
| 035 | _aF8901000719529 | ||
| 084 | _aTRB SR 250 1997 | ||
| 245 | _aAir traffic control facilities: improving methods to determ-ine staffing requirements | ||
| 260 | _aWashington, D.C. : TRB | ||
| 300 | _a[101] p. | ||
| 440 | _aSpecial report ; 250 / Transportation Research Board | ||
| 690 | _aTránsito aéreo - Control - Estados Unidos | ||
| 710 | _aNational Research Council. Transportation Research Board (E-.U.A.) | ||
| 999 |
_c65551 _d65551 |
||