por Magoon, Estus Hubert, 1892- [autor] | Hernandez, Juan A [traductor].
por Barber, Marshall Albert, 1862-1953 [autor] | Russell, Paul F [prologuista].
por Russell, Paul Farr, 1894- [autor] | Fosdick, Raymodn B [prologuista] | West, Luther Shirley, 1899- [autor] | Manwell, Reginald Dickinson, 1897- [autor] | National Research Council. Division Of Medical Sciences.