00253nam a22001097a 4500040000900000082001600009100002000025245004100045260004000086300001000126521000700136  cNUST  a621.41bSWI  aSwinerd, Graham  aHow Spacecraft Fly /cGraham Swinerd  aUnited States :b Springer ;c2008.  a282p.  bHB