00310nam a2200097Ia 4500008004100000082002700041100002000068245007300088260004300161300000800204140113s9999    xx            000 0 und d  a576.312.31(082.2)   L3  a"Pfeffer, R.A."  aModern aspects of cytogenetics : Constitutive heterochromatin in Man  a1973bF.K. Schattuuer VerlagcNew York  a248