共 8 条
- [1] BLOCK G, 1981, 66TH ANN M AM OCC ME
- [3] METHODS OF STUDYING THE RELATION OF EMPLOYMENT AND LONG-TERM ILLNESS - COHORT ANALYSIS [J]. AMERICAN JOURNAL OF PUBLIC HEALTH AND THE NATIONS HEALTH, 1959, 49 (11): : 1525 - 1536
- [4] MARSH GM, 1979, J OCCUP ENVIRON MED, V21, P665
- [5] SOCIAL SECURITY NUMB
- [6] 1951, TABLE YEARS ISSUE SO
- [7] EVIDENCE CITIZENSHIP
- [8] 1937, TABLE SOCIAL SECURIT