Comparison of Two Simple Methods for Determining Lecithin/Sphingomyelin (L/S) Ratios in Human Amniotic Fluid Samples Authors Barth H. Ragatz Gina Modrak Patricia S. Conn Abstract Author Biographies Barth H. Ragatz Gina Modrak Patricia S. Conn Downloads PDF Published 1984-01-01 Issue Vol. 94 (1984) Section Chemistry