TY  - BOOK
AU  - E.U.A. Railroad Retirement Board
TI  - Occupational differences in separation rates for railroad workers, 1965-68 \ D-
U1  - 371.17973  .E582a.s..9    . 
CY  - Chicago
KW  - Cowen, James L., pról
KW  - Drennan, Daniel F
KW  - Ferrocarriles - Salarios, pensiones, etc - E U A
N1  - 006951
ER  -