00277nam a2200109Ia 4500008004100000082001500041100001500056245005100071260002700122300001000149650000800159060110s9999    xx            000 0 und d  a520bLEY/R  aLEY, Willy  aRockets, Missiles, and men in spacecWilly Ley  bAsif Publicationc1944  a668p.  a520