Title: Kinship Terms External Scales

Source: Rosenberg and Kim (1975)

Description: Three external scales that can be derived from 15 kinship terms.
The scales are:

- Gender (1 = male, 
          2 = female, 
          9 = missing), 
- Generation (-2 = two back, 
              -1 = one back, 
               0 = same generation, 
               1 = one ahead, 
               2 = two ahead,) 
- Degree (1 = first, 
          2 = second, 
          etc.).