000 00281nam a2200109Ia 4500
008 220201s1960 xx 000 0 eng d
100 _aTopplng, J
245 0 _aErros of observation & their treatment
260 _bLondon : Chapman & Hall Ltd.
_c1960
300 _a119
942 _2ddc
999 _c72176
_d72176