1. Correspondance;Duenholter;Am. J. Obstet. Gynec.,1977
2. Choice of hormone assay in the assessment of feto-placental function;Klopper,1977
3. Observations on the variability of plasma estriol;Klopper;Obstet. and Gynec.,1977
4. Plasma steroids in the assessment of normal and abnormal pregnancy;Tulchinsky,1974
5. Comparison of maternal serum and urinary estrogen determinations as indicators of fetal well-being;Giorgi;Annls Biochem.,1977