"The article [provides] examples of error in the censuses and surveys and questions the reliability of age specific sex ratios in the 1990 Census of Turkey...[and derives] sex ratio at birth from census and survey results as well as from hospital records.  Finally the 1990 population is reconstructed by surviving birth cohorts [from] 1900 until 1990 using historical trends of birth rates and cohort, age and time specific survival rates using the East Family of Coale-Demeny Model Life Tables." (SUMMARY IN ENG)