| Name | Label | Concept | Required | Attribute of | Limit | Predicate Type | Group | |
|---|---|---|---|---|---|---|---|---|
| 1 variable | ||||||||
| B21002_004M | Margin of Error!!Total!!Vietnam Era, no Korean War, no World War II | PERIOD OF MILITARY SERVICE FOR CIVILIAN VETERANS 18 YEARS AND OVER | not required | B21002_004E | 0 | int | B21002 | |