Perriss, B W Intrathecal morphine. [electronic resource] - Anesthesiology Jul 1980 - 82 p. digital Publication Type: Letter ISSN: 0003-3022 Standard No.: 10.1097/00000542-198007000-00023 doi Subjects--Topical Terms: Anesthesia, ObstetricalFemaleHumansInjections, SpinalMorphine