591.3 P Patten, Bradley Merrill, 1889- The early embrvology of the chick, by Bradley M. Patton. 2ª ed. with 64 Illustrations contining 213 figures. Philadelphia, P. Blakiston´son & co. [c1925] 177 p. col. front. illus. 24 cm ´´References for collateral reading´´: p. 162-170.