000			00315nam a2200133Ia 4500
100			_aChristensen, Larry B
020			_a978-0-205-70165-0
250			_a11th ed
942			_cBK
245			_aReseach methods, design and analysis
260			_aAllyn & Bacon, Boston _c2011
082			_a307.2 Chr
300			_axx,539
999			_c48860 _d48860