00362nam a2200145Ia 4500008004100000082001600041100002300057245002600080250000600106260003400112300000800146650001800154650001800172653002600190170901s1958    xx            000 0 und d  a574.3bB39E  aBeer, Sir Gavin De 0aEmbroys and Ancestors  a3  aOxfordbClarendon Pressc1958  a197  aLife sciences  aPure Sciences  aDevelopmental biology