000			00316nam a2200133Ia 4500
008			180626s9999 xx 000 0 und d
082			_a500 H737gt 1985
100			_aHolmes, Neal J.
245		0	_aGateways to science
260			_aNew York
260			_bMcGraw-Hill Book Co.
260			_cc1985
650			_aScience
999			_c47532 _d47532