TY - GEN AU - NIEUWKOOP,P D TI - The present state of the problem of the Keimbahn in the vertebrates SN - 0014-4754 PY - 2007///1227 KW - Animals KW - Heredity KW - Humans KW - Vertebrates N1 - Publication Type: Journal Article UR - https://doi.org/10.1007/BF02172633 ER -