000			003410000a22001330004500
245			_aIllusion in nature and art
100			_aGregory, R.L. ed.
100			_aGombrich, E.H. ed.
260			_aLondon _bGerald Duckworth _c1973
300			_a288p. : ill. (some col.), photos.
080			_a7.017.9 _bI4
041			_aEN
942			_cBK _02
999			_c119629 _d119629