OUNT MARY HYMNAL, produced in 1937 by Sister Mary Gisela, was published in Milwaukee. This was quite a famous hymnal, although in my opinion the poetry of several hymns is a little too emotional & simplistic. You can download all 255 pages:
* * PDF • MOUNT MARY HYMNAL (255 pages)
Those who know the history of Wisconsin Catholics—especially the influence of Singenberger—will not be surprised to discover a preponderance of German & Latin hymns. Many of them, such as this one from the Strassburg Hymnal (1850), I had never heard before.
Like all hymnals, it is not without typos. For instance, if you look at hymn #44 (measure 6) you’ll see an error in the organ accompaniment. If you have any doubt, compare that same measure to hymn #117.