00293nam a2200109Ia 4500008004100000040001100041100002100052245005200073260003500125300001300160300001000173251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aElizabeth D. Hay 0aDevelopmental BiologybAn International Journal  c1971bAcademic PressaNew York  aP. 1-673  bV. 26