000 00302nam a2200121Ia 4500
008 160601s9999 xx 000 0 und d
100 _aHagerstrand, Torsten
_912798
245 _aInnnovation differnion as a spatral process
260 _aChicago
260 _bUniversity
260 _c1967
300 _a334
999 _c4097
_d4097