00613nam a2200205Ia 4500003000900000008004100009020001800050040001600068080001500084100002600099245008100125260002700206300001300233490004700246650001500293650002400308650003000332650003100362700001400393IN-BaIIA211028s9999    xx            000 0 eng d  a0-85233-557-2  cIIA Library  a523.6bJAM  aJames, N and North, G 0aObserving cometscN. James and G. North                                       aLondonbSpringerc2003  ax, 234p.  aPatrick Moore's Practical Astronomy Series  aAstrometry  aCometary Photometry  aComets- Amateur's Manuals  aComets- Observer's Manulas  aNorth, G.