Kynast, G Rapid specific determination of amniotic fluid lecithins as a test of fetal lung maturity. [electronic resource] - Journal of perinatal medicine 1973 - 213-8 p. digital Publication Type: Journal Article ISSN: 0300-5577 Standard No.: 10.1515/jpme.1973.1.3.213 doi Subjects--Topical Terms: Amniotic Fluid--analysisFemaleHumansLung--embryologyPhosphatidylcholines--analysisPregnancy