000 00313nas a2200121Ia 4500
008 170101s2017 xx 000 0 und d
044 _aU.S.A.
245 0 _aDISSERTATION Abstracts
260 _bUniversity Microfilms
_aAnn Arbor
270 _aUniversity Microfilms
362 _aJan - Dec,1968
942 _2ddc
_cP
999 _c157401
_d157401