000			00299nam a22001217a 4500
082			_a304.6 _bPET/P
100			_aPetersen, William.
245			_aPopulation / _cby William Petersen
260			_aNew York : _bThe Macmillan company, _c1961.
300			_a652p. :
650			_apopulation
942			_cBK
999			_c305017 _d305017