003350000a22001210004500060000800000082001700008100001700025245005000042260002800092260000900120300000800129650007600137  a100  a574.8761 BEL  aBell, Eugene  aMolecular and cellular aspects of development  aNewyork, Harper and row  c1966  a525  aMolecular development / cellular development / differentiation cytology