Catechism of Pope St. Pius X (CPX) p.131-135 Q/A 15-26.
CPX 33 on the Eastern Rites:
Fr. Z on fasting expected of Roman Catholics in 1873 in Newark, NJ:
Catechism of the Council of Trent: https://www.amazon.com/Catechism-Council-Trent/dp/089555884X/ref=sr_1_3?crid=3374R7MJFFT3C&keywords=catechism+of+trent&qid=1645990154&sprefix=catechism+of+tren%2Caps%2C115&sr=8-3