000 00276nam a2200109Ia 4500
008 160710s1951 xx 000 0 und d
100 _aBEELER,N.F. & BRANBY
245 _aEXPERIEMENT IN OPTICAL ILLUSION
260 _bTHOMAS Y. CROWELL
_c1951
300 _a114
942 _2ddc
_cB
999 _c19883
_d19883