000 00307nam a2200121Ia 4500
008 140317s9999 xx 000 0 und d
082 _a307.2
100 _aAckoff,Russell L.
245 4 _aThe design of social research. 3rd ed.
260 _aChicago
_bUniv. of Chicago
_c1953
300 _a420
942 _2ddc
_cBK
999 _c933
_d933