000			00525nam a22001577a 4500
003			FRI
082			_221st ed. _a311.2 _bCLA/C
100			_aClatworthy, Willard H.
245			_aContributions on partially balanced incomplete block designs with two associate classes _cby Willard H. Clatworthy
260			_aWashington: _bDepartment of Commerce, _c1956.
300			_aiv,70p. _c25cm.
490			_a Applied Mathematics Series. 47
653			_aMathematical statistics
653			_aExperimental design
942			_2ddc _cEN
999			_c36747 _d36747