TY - JOUR T1 - On the Inversion of the Blastodermic Layers in the Rat and Mouse JF - Proceedings of the Royal Society of London (1854-1905) VL - 34 SP - 430 EP - 437 PY - 1882/01/01/ UR - http://dx.doi.org/10.1098/rspl.1882.0061 M3 - doi:10.1098/rspl.1882.0061 AU - Fraser, A. ER -