Una Voce:

"Darroch presents in chronological order a ... history ... of the work of the Foederatio Internationalis Una Voce, a movement of lay people formed after the ... enforcement of Novus Ordo Missae. It is the first fully documented account of the decades-long struggle for the preservation of the traditional rite of the Mass in the face of ... opposition from the bishops of the Church"--Back cover.