The Gregorian Propers, with English translation, can be found in the Gregorian Missal, p. 615, which can be accessed and downloaded from the CMAA site, somewhere.
The Graduale Simplex propers are Englished and set to the chant melodies in By Flowing Waters: Chant for the Liturgy (Collegeville (The Liturgical Press, 1999) from BFW 316 through BFW 321.
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