A computational methodology for estimating child-years of dependency (CYD) from the 1968 NDS pregnancy roster
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr | 
| Iaith: | English | 
| Cyhoeddwyd: | [S.l.
          s.n.]
    
        1975. | 
| Cyfres: | Research note / University of the Philippines. Population Institute
              no. 18 | 
| Pynciau: |