if there's a discrepancy in versions as is obviously the case here then it would be easiest to include the details in a note i don't think there's much to be gained about arguing over it further given there is no support in the billboard lists of for the figure i would suggest appear in the article with an explanatory note about the in other sources you could do it the other way round but i think the weight of evidence so far i e the whitburn rs backed by the billboard primary source suggests the other sources are in error