000			00284nam a2200121Ia 4500
008			140317s9999 xx 000 0 und d
082			_a551.4
100			_aUnesco.
245			_aAerial Surveys and integrated studies.
260			_aUnesco _b _c1968
300			_a575
942			_2ddc _cBK
999			_c12294 _d12294