00310nam a2200097Ia 4500008004100000082002300041100003100064245006900095260004000164300000800204140113s9999    xx            000 0 und d  a576.12(082.2)   J3  aSociety for Exptl. Biology  aEvolution :Symposia of the society for experimental biology no.7  a1953bCambridge Univ. PresscLondon  a448