000 00299cam a2200121 i 4500
020 _a0815198647
050 0 0 _aMED RA421
_bO33
245 0 0 _aOccupational medicine :
260 _aChicago :
_bYear Book Medical Publishers,
_c1975.
300 _axv, 944 p. :
_bill. ;
700 1 _aZenz, Carl,
942 _cBK
999 _c7401
_d7401