Breviary comparisons and timelines for the 20th century

I wanted to note an interesting website that I've run into recently. Keller Books: Similarities and Differences among Breviary Structures and Texts which looks as well at the breviaries of the Carmelites, Dominicans, etc.. They also have a Breviary Timeline which describes its purpose as presenting "Official Breviaries and Breviaria Parva as they appeared (along with other important liturgical events as they happened) in Europe and the USA". This particular timeline begins at the turn of the 20th century. Take a look as well at their overview.