000			00279nam a2200109Ia 4500
008			130521s9999 xx 000 0 und d
100			_a"Sagan, Carl"
245			_aPlanets /
260			_aNederland :
650			_aASTRONOMY - PLANETS;PLANETS
700			_a"Leonard, Jonathan Norton"
999			_c14669 _d14669