000 00309nas a2200121Ia 4500
008 170101s2017 xx 000 0 und d
044 _aU.S.A.
245 0 _aSUPERVISION
260 _bNational Research Bureau
_aBurlington
270 _aNational Research Bureau
362 _aJan - Dec,1972
942 _2ddc
_cP
999 _c168571
_d168571