Martin Mosebach
The book argues for a return to the Tridentine Mass , about which the 2007 motu proprio "Summorum Pontificum" declared that , rather than a "rite" , it is a form of the one Roman Rite , stating also that the 1962 Roman Missal , which contained its final form , had never been formally abrogated . 
<triplet> Roman Missal <subj> Roman Rite <obj> part of