Variable | Year | Supplement |
---|---|---|
BLODTIME | 1978 | Person (core questionnaire) |
BLODTIME | 1973 | Person (core questionnaire) |
NBLDDO12 | 1990 | AIDS knowledge and attitudes |
NTBDP12M | 1992 | AIDS knowledge and attitudes |
NTBDP12M | 1991 | AIDS knowledge and attitudes |