Boyden, Edward Allen,1886- A volumetric analysis of young human embryos of the 10 and 12-somite stage; with four plates (two colored) and six text figures. 611.013 (In Carnegie institution of Washington, c280 Contributions to embryology. Washington, 1940. v.28 29 x 23. vol. xxviii, 191 p., incl. illus., tables. Contributions to embriology, no. 175. Carniege institution of Washington publication no, 518 )