000			00372pam a2200133a 44500
082			_aNASA _bTN D-6968
100			_aMoeckel,W E
245	1		_aCOMPARISON OF ADVANCED PROPULSION CONCEPTS FOR DEEP SPACE EXPLORATION
260			_a _bNasa, Washington, D.C. _c1972
300			_a35
500			_aBound With Nasa Tn D-6960-6967, 6969
964			_gCIRC
997			_aTR12422 C
999			_c396954 _d396954