1. Obstetrics: a text-book for the use of students and practitioners Author(s): Williams, J. Whitridge (John Whitridge), 1866-1931 Publication: New York : Appleton, 1915 Subject(s): Obstetrics
2. Obstetrics: a text-book for the use of students and practitioners Author(s): Williams, J. Whitridge (John Whitridge), 1866-1931, author Publication: New York : D. Appleton and Company, 1924 Subject(s): ObstetricsPregnancy -- physiologyPregnancy Complications
