000			00355nam a2200157Ia 4500
008			190201s9999 xx 000 0 und d
020			_a853346151
082			_a500
082			_b2 PHY
100			_a"Bragg, William Lawrence"
245		4	_aThe Royal Institution Li
260			_aLondon
260			_bApplied Science
260			_c1970
300			_a577
999			_c23820 _d23820