And if you click you have access to all the pages in the different books, and a pdf version of the Graduale triplex, as it seems (but with the french translation, as I understand).
It's not comprehensive, but it would give you a starting point to work from. It has Sunday and holy day chants common to both the traditional and novus ordo books, so basically anything that's found in both the Liber brevior and Gregorian Missal is there.
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