This is the fourth in a series of reports presenting analyses of the data from the 1980 census of Thailand. It presents an application of the own-children method of fertility estimation. "The estimates of total fertility rates and age-specific fertility rates for all women for the period of 1965-1979 are reported annually for each of the 71 provinces, 4 regions, Bangkok Metropolis, and the Whole Kingdom. The estimates are also reported for municipal areas and non-municipal areas of each province, region, and the Whole Kingdom. In addition, the Coale-Trussell m-index of marital fertility control is estimated for the three 5-year periods preceding the 1980 Census for each changwat (province)." (EXCERPT)