000 00330nam a2200109Ia 4500
008 160523s9999 xx 000 0 und d
020 _a978-0-486-20107-8
100 _aHadmard, J.
245 3 _aAn Essay on the psychology of invention in the Mathematical field
260 _aNew York
_bDover Publication
_c1945
300 _axiii, 145p.
999 _c33364
_d33364