000 00293 a2200133 4500
020 _a9780335096626
040 _budc
100 _aErickson B H.
_91907
245 _aUnderstanding data
250 _a2ed
260 _bOpen University Press
_c16 September 1992
300 _b400 p
942 _cG
999 _c4313
_d4308