Click on the links below to view the Circulars
- 16-01 Hooker Electrochemical Corporation Special Exposure Cohort Class (SEC) from July 1, 1944 through December 31, 1948
- 16-02 Form SSA-581 (Authorization to Obtain Earnings Data from the Social Security Administration)
- 16-03 Battelle Laboratories at the King Avenue Site in Columbus, Ohio, Special Exposure Cohort (SEC) from July 1, 1956 through December 31, 1970
- 16-04 Idaho National Laboratory (INL) Special Exposure Cohort (SEC) from March 1, 1970 through December 31, 1974
- 16-05 Argonne National Laboratories-West, Scoville Idaho, Special Exposure Cohort (SEC) from April 10, 1951 through December 31, 1957
- 16-06 Lawrence Livermore National Laboratory (LLNL) Special Exposure Cohort (SEC) from January 1, 1974 through December 31, 1989