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- [2] SITE OF AMNIOCENTESIS AND LECITHIN-SPHINGOMYELIN RATIO OBSTETRICS AND GYNECOLOGY, 1978, 52 (05): : 552 - 554
- [5] MODE OF DELIVERY AND THE LECITHIN-SPHINGOMYELIN RATIO BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY, 1979, 86 (12): : 965 - 968
- [10] LECITHIN-SPHINGOMYELIN RATIO IN FETAL MEMBRANES DURING GESTATION EUROPEAN JOURNAL OF OBSTETRICS GYNECOLOGY AND REPRODUCTIVE BIOLOGY, 1980, 11 (01): : 31 - 34