Our American colleagues of the USA Latin Liturgy Association have just brought out their Newsletter No. CXVII. Amongst other things, it contains a short but interesting article on Pope Francis and the Liturgy. You need to become a member to receive the pdf of the Newsletter.
Among the links in this latest edition are: to an interview with Bishop Athanasius Schneider, and on the 50th anniversary of Musicam Sacram, promulgated on 5 March 1967.