000			00356nam a2200145Ia 4500
008			180611s9999||||xx |||||||||||||| ||und||
020			_a0-85498-393-7
041			_aen
082			_a530.072
100			_aHART . M.
245		0	_aReports on Progreess in Physics part 04
260			_aBristol _bIOP Pub Ltd _c1990
300			_a422p. vol 53
942			_cLL
999			_c8473 _d8473