Neither can I figure out how they could do it, since it’s actually always been a matter of canon law that you need the bible present for the liturgy.
However, the actual text of the mass, although (unlike most Protestant sects) is derived nearly entirely from the mass, with obvious exceptions (such as the Littany of the Saints). It is this text which appears in the missalettes, complete with the bible passages selected for each day’s readings.
Huh?