000 00339nam a2200145 4500
008 160616s1965 000 0
245 _aGraphical methods in research
100 _aLevens, A.S
260 _aNew York
260 _bJohn Wiley and sons
260 _c1965
300 _a217
942 _cBK
_2BK3216
080 _a517.518.8 LEV
999 _c3216
_d3216