000 00297nam a2200133Ia 4500
008 161121s9999 xx 000 0 und d
100 _aPOPLIN (DENNIS E)
245 0 _aCommunities : A survey of theories and m
260 _cNIL
365 _b0
650 _aNIL
652 _a#N/A
942 _cBK
999 _c57733
_d57733