Hartung, H J [Epidural morphine injection for analgesia during labor. Preliminary report]. [electronic resource] - Fortschritte der Medizin Apr 1980 - (500) p. digital Publication Type: Journal Article ISSN: 0015-8178 Subjects--Topical Terms: FemaleHumansInjections, SpinalLabor, Obstetric--drug effectsMorphine--administration & dosagePregnancyStress, Psychological--drug effects