000			00530pam a2200205 a 4500
020			_a0192627449
050	0	0	_aRA652.4 _bE9
100	1		_aElwood, J. Mark.
245	1	0	_aCritical appraisal of epidemiological studies and clinical trials
250			_a2nd ed.
260			_aOxford _bNew York _c1998
300			_ax, 448p. _bill.
650		0	_aEpidemiology
650		0	_aClinical trials.
650		0	_aClinical trials
650		0	_aDiseases
650	1	2	_aEpidemiologic Methods.
700	1		_aElwood, J. Mark.
942			_cBK
999			_c4447 _d4447