References
- Greville , T. N. E. 1945 . U.S. Abridged Life Tables
- Herskovits , M. J. and Herskovits , F. S. 1947 . Trinidad Village
- Kuczynski , R. R. 1935 . Measurement of Population Growth 194 – 194 .
- Greville , T. N. E. 1946 . U.S. Life Tables and Actuarial Tables, 1939–41 Washington