1. El tiempo como indicación de intervenir en obstetricia: tésis Author(s): P. Carral, Francisco de, author Publication: México : Tipografia de Hernández Hermanos, 1895 Subject(s): Labor, ObstetricObstetric Labor Complications
2. Obstetric tables Author(s): Pajot Dr. (Charles), 1816-1896 Publication: [Richmond, Va.] : Richmond Enquirer Book and Job Press, 1856 Subject(s): Labor, ObstetricObstetric Labor Complications