000 00294nam a22001337a 4500
020 _a 080068146
050 _aMED QR359
_bU3
100 _aUsher,George
245 _aAn introduction to viruses
260 _aOxford
_bPergamon
_c1970
300 _aiv,32p.
_bill.
650 _aViruses
942 _cBK
999 _c1610
_d1610