00283nam a2200109Ia 4500008004100000040001100041100001700052245003600069260004500105300001300150300001000163251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aD. H. Watson 4aThe Journal of General Virology  c1973bCambridge University PressaLondon  aP. 1-478  bV. 20