000			00367nam a2200157Ia 4500
008			180611s9999||||xx |||||||||||||| ||und||
020			_a443018510
041			_aen
082			_a616
100			_aBARKER D.J.P.
245		0	_aEpidemiology in Medical Practice
250			_a2nd Ed
260			_aNew york, _bChurcHill LivingStone _c1979
300			_a151p.
942			_cLL
999			_c602 _d602