The Library of Congress assigned call number for LDS (Mormon) Hymnals is M 2129.
This call number range is subdivided as follows:
M 2129 .C44 - various editions of the Children's songbook
M 2129 .C48 - selections from Songs of Zion
M 2129 .D47 - Deseret Sunday School Songs
M 2129 .H94 - Hymns and Children's songs in various languages other than English
M 2129 .H95 - Hymns (the LDS hymnal from 1948 to the present) in various English editions and in various other languages
Earlier hymnals can be found either in Music Special Collections or L. Tom Perry Special Collections, for in-library use only.
BX 8685.2 is the LC classification used in the latter.
M 2129 .H97 - Hymns Today (a serial publication of hymns written by contemporary LDS composers)
CD recordings of LDS hymns can be found at M 2129.8
LDS Church Music Library
So many resources! LDS hymnals and beyond. Church music submissions, hymns published in church magazines and more.
Hymnary.org
A comprehensive index of over 1 million hymn texts, hymn tunes, and hymnals, with information on authors and composers, lyrics and scores.
The Cyber Hymnal
This site has over 10,100 Christian hymns & Gospel songs from many denominations & languages. We have lyrics, sheet music, audio, pictures, biographies, history, & more.
Sing Praises.net: LDS Hymns
This page has detailed information about current and past LDS hymnbooks in all languages.
There is also information about LDS musicians and their recordings.
Hymn Arrangements and Free Accompaniments
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Alphabetical list of hymns in the 1985 hymnbook, with information about available hymn arrangements or free accompaniments.
Essay on vocal ranges of LDS Hymns
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M 2115 - general hymnals (non-denominational)
M 2119 - Catholic
M 2120 - Orthodox
M 2122 - Baptist
M 2123 - Congregationalist
M 2124 - Dutch and other reformed
M 2125 - Episcopal
M 2126 - Lutheran
M 2127 - Methodist
M 2128 - Moravian
M 2130 - Presbyterian
M 2131 - other denominations, A-Z
M 2134-M 2143 - other languages
M 2144 - Jewish
M 2145 - other religions A-Z