From http://www.ccwatershed.org:
Readers will recognize the name of Achille P. Bragers (1887-1955), who became the most famous exponent of the Solesmes accompaniments—surpassing even Julius Bas, Henri Potiron, and Jean Hébert Desroquettes in fame.
This “Bragers Service Book” (1941) will please you very much. It contains miscellaneous chants frequently sought by organists: Concordi Lætita, Salve Mater Misericordiæ, Inviolata, Rosa Vernans, Virgo Dei Genitrix, Sub Tuum Præsidium, O Quam Suavis (where Sanctus VIII comes from), Ave Verum Corpus, Adoro Te Devote, litanies, and tons more: