000			00315nam a2200133Ia 4500
008			140317s9999 xx 000 0 und d
082			_a591.51
100			_aTinbergen,N.
245			_aSocial behaviour in animals.
260			_aLondon _bMethuen _c1962
300			_a150
650			_aZoological Sci.
942			_2ddc _cBK
999			_c991 _d991