000			00367nam a2200145Ia 4500
008			160615s9999 xx 000 0 und d
100			_aLAYZER(David) et al Eds
245			_aAnnual review of astronomy and astrophysics. Vol-20
260			_bAnnual Reviews Inc.
260			_c1982
300			_a631 p.
942			_cBooks
999			_c15070 _d15070