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PeriodicCodes.html
PeriodicCodes.html
http://www.minorplanetcenter.net/iau/lists/PeriodicCodes.html
Howard J. Brewington
List of periodic comets
Link from a Wikipage to an external page
PeriodicCodes.html
http://www.minorplanetcenter.net/iau/lists/PeriodicCodes.html