MPEC 2011-V31 : OBSERVATIONS AND ORBITS OF COMETS
MPEC 2011-K13 : OBSERVATIONS AND ORBITS OF COMETS
MPEC 2011-J28 : OBSERVATIONS AND ORBITS OF COMETS
MPEC 2011-G90 : OBSERVATIONS AND ORBITS OF COMETS
MPEC 2010-H27 : OBSERVATIONS OF COMETS
MPEC 2010-E21 : OBSERVATIONS OF COMETS