1. Pregnancy, parturition, and childbed among primitive people Author(s): Engelmann, George J. (George Julius), 1847-1903 Publication: [New York : s.n., 1881] Subject(s): PregnancyHome ChildbirthPopulation Groups
2. The unity of mankind: an introductory lecture, delivered before the class of the medical department of the St. Louis University Author(s): Linton, M. L. (Moses L.), 1808-1872 Publication: St. Louis, Mo. : Printed at the Missouri Democrat Office, [1854?] Subject(s): Human DevelopmentPopulation Groups