000			00418nam a2200145Ia 4500
008			170101s1978 xx 000 0 und d
082			_aT 519.92 S62R
100			_aSood, Ravi Kiran
245		0	_aResidue class PBIB design taken as symmetrical factorial experiments
260			_aLudhiana _bP. A. U. _c1978
300			_a28cm. 65l
650			_aOPERATIONS RESEARCH
653			_aOPERATIONS RESEARCH
942			_2ddc _cT
999			_c64754 _d64754