000 00354nam a2200145Ia 4500
008 160615s9999 xx 000 0 und d
100 _aTIKHONOV(A N) & GONCHARSKY(A V) Ed
245 _aIII-posed problems in the natural sciences
260 _bMir
260 _c1987
300 _a344p p.
942 _cBooks
999 _c18119
_d18119