We are grateful to our friends at Traditional Catholic for their extensive research in finding the following resources.
Ordo Missae of the Missale Romanum 1962 (latin/english) – includes mp3 audio
Ordo Missae – Ordinary of the Mass (latin/english; 1921) – read online
The Roman Missal/Missale Romanum (1913, english/latin) – pdf, text, kindle format
Divine Office; Little Office of BVM (latin/english) – read online
Sancta Missa (Sacred Liturgy, Music… – tutorials, guides, texts, audios)
The Holy Mass (Fr. Michael Mueller) – pdf, text, kindle format; or audiobook here
The Sacrifice of the Mass (Fr. M. Gavin) – read online; or audiobook here
Explanation of the Prayers and Ceremonies of Holy Mass (Dom P. Gueranger) – pdf
Explanation of the Holy Sacrifice of the Mass (Fr. Martin Cochem) – pdf; or pdf, text, kindle format here
The Mass in Slow Motion (Mons. Ronald Knox) – pdf
Calvary and the Mass (Abp. Fulton Sheen) – read online
The Order and Ceremonial of the Most Holy Sacrifice of the Mass (F. Oakeley) – pdf, text, kindle
The Church’s Year: Explanation of the Epistles and Gospels (Fr. Leonhard Goffine) – read online; or pdf, text, kindle format here
The Liturgical Year (Dom Prosper Gueranger) – read online
The Mass: A Study of the Roman Liturgy (A. Fortescue) – pdf, text, kindle format
A History of the Mass and Its Ceremonies (Fr. John O’Brien) – pdf, text, kindle format
Liber Usualis – 1961 (pdf) here; 1903 (pdf, text, kindle format) here
A Manual of Gregorian Chant (Solesmes) – pdf, text, kindle format
Gregorian Chant Manual (Bp. J. Schrembs) (1935) – pdf
Rituale Romanum (1853; latin) – pdf; [an english translation of the 1962 version is here]
Diurnale Romanum (latin/english) – pdf
The Hymns of the Breviary and Missal – pdf
The Manual of the Holy Catholic Church (Fr. J. McGovern) – pdf, text, kindle format
The Visible Church, Her Government, Ceremonies, Sacramentals, Festivals and Devotions (Fr. J. F. Sullivan) – pdf, text, kindle format