| 000 | 00634nam a2200205Ia 4500 | ||
|---|---|---|---|
| 008 | 140128s9999 xx 000 0 und d | ||
| 040 | _besp Biblioteca CIESS | ||
| 041 | _aing | ||
| 082 | _a371.17973 .E582a.s..9 . | ||
| 100 | _aE.U.A. Railroad Retirement Board | ||
| 245 | _aOccupational differences in separation rates for railroad workers, 1965-68 \ D- | ||
| 260 | _aChicago | ||
| 260 | _bOffice of the Chief Actuary | ||
| 260 | _c1971 | ||
| 300 | _a47 p., 27 cm. | ||
| 500 | _a006951 | ||
| 650 | _aCowen, James L., pról. | ||
| 650 | _aDrennan, Daniel F. | ||
| 650 | _aFerrocarriles - Salarios, pensiones, etc - E U A | ||
| 999 |
_c4459 _d4459 |
||