"Using data [for India] on proportions of children dead...estimates of infant and child mortality are...obtained by Sullivan and Trussell modifications of [the] Brass basic method.  The estimate of child survivorship function derived after logit smoothing appears to be more reliable than that obtained by the Census Actuary.  The age pattern of childhood mortality is suitably modelled by [a] Weibull function defining the probability of surviving from birth to a specified age and involving two parameters of level and shape.  A recently developed linearization procedure based on [a] graphical approach is adopted for estimating the parameters of the function."