000			00313nam a2200145Ia 4500
008			190201s9999 xx 000 0 und d
082			_a621
082			_b402 IO
100			_a"Ion, D C"
245		0	_aAvailability Of World En
260			_aNew York
260			_bMcGraw Hill
260			_c1980
300			_a345
999			_c31021 _d31021