000 00304nam a2200109Ia 4500
008 171211s9999 xx 000 0 und d
245 _aRocket Propulsion Elements, 9 edition
245 _cGeorge P. Sutton
260 _c2016
650 _xASTRONOMY
856 _uhttp://down.ebook777.com/064/1118753658.pdf
999 _c349393
_d349393