TY  - BOOK
ED  - E.U.A. Department of Health, Education and Welfare
TI  - The 1% sample Longitudinal Employee employer Data file. LEED - A data file from the continuous work history sample
U1  - 368.40973 21
PY  - 1971///
CY  - Washington
PB  - SSA. Division of Statistics
KW  - Registros en la seguridad social
KW  - Estados Unidos
N1  - Bibliografía p. 25; I. Introduction. II. Scope and Limitations. III. Record Contents. IV. Sources of Data and Definitions. V. Procedures. VI. Control Counts. VII. Reference Material
ER  -