I’m grateful for the many people who have helped me in my research – answering questions, typing song titles in other languages, providing cross-reference information, allowing access to physical books, providing online resources, participating in surveys, reporting errors, and providing general encouragement – among whom are:

Foreign-language Latter-day Saint hymnbooks: Alex Doxey (Russian); Anna Peterson (Swedish); Brett Hill (Russian); Brian Wood (Chuukese); Cameron Hilker (Japanese); Collins Carrington (Maltese); Colter Anderson (German); Curtis Felt (German, via Nate Blaylock); Daniel Avery (Bulgarian); David Hosmer (Russian); David Sabey (Italian); David Waterbury (Japanese); Elizabeth Vakalala (Fijian); Frédéric Sorhaitz (French); Grant Vaughn (Welsh); Heather Stinson (Japanese); James Miller (Ukrainian); Jaron Nelson (Vietnamese); Jeremy Jex (Dutch); Joan Sowards (Thai); Joe Rigby (Korean); John Linn (Finnish); John Wilcox (Russian, via Nate Blaylock); Joseph Atmajaya (Indonesian); Joseph Augustine (Japanese); Joshua McGlothin (Albanian); Katie Shaw (Finnish); Kiri Pugmire (Japanese); Kirsa Merrell (Romanian); Kyle Murray (Hungarian); Lisa Callister (Russian); Marco Mora (Marshallese); Michael Peck (Kekchi); Nate Blaylock (German, Japanese, Russian); Noodchanadaa Seangsuwan (Thai); Orraphan Piakpia (Thai); Paul Boshard (German); Robert Allen (Georgian); Saira Aslam (Urdu); Sarah Bowthorpe (Tagalog); Sarah Peterson (Estonian); Sylvia Contesse (French); Tanya Kawasaki (Lao); Thomas Bradshaw (Romanized Mandarin); Thongchanh (John) Tanh (Lao); Xane Beckstead (Spanish); Zara Manukyan (Armenian).

Miscellaneous other hymnbooks and collections: Brett Nelson (various); Bruce Forbes (various); Eva Erickson (Community of Christ); David Bolton (Community of Christ); Deryle Lonsdale (various); Joey Williams (Community of Christ); Izabela Geambasu (FSY music); Jeffrey M. Bradshaw (various); Katie Bastian (general conference music); Kenneth Cope (EFY music); Kevin McMilian (Restoration hymns); Loraine Peterson (Relief Society and Primary songs); Marge D’Amico (The Church of Jesus Christ, Monongahela, Pennsylvania); Michael Hicks (various); Michael Young (general conference music); Mindy Jeppesen (Hymns: Simplified Accompaniments, via Nate Blaylock); Myrna Layton (various); Nik Day (FSY music); Noel Jensen (Netherlands); Paul Ludy (Restoration hymns); R. Jean Addams (Restoration hymns); Robert Moorefield (EFY music); Sandee Gamet (Community of Christ); Stephen T. Whitlock (Latter-day Saints’ Psalmody); Thomas Bradshaw (Restoration hymns).

Music resources: Norman Schmidt (hymns in ABC notation); Joey Stanley (survey data); Kjerste Christensen (survey data); various survey respondents.

Technical resources and support: Robert Bradshaw; Thomas Bradshaw.

Organizations and businesses: BYU Harold B. Lee Library (Myrna Layton; Lindsey Memory; Marissa Bischoff; Abigail Maccabee; Abigail Welling; Candice Taylor; BYU Special Collections; BYU Digital Collections); Church History Library (Angie Potter; Audrey Dunshee; Brian Passantino; Jeff Thompson; Ryan Combs; Church History Catalog); BYU Multi-Stake Music Library (Tanner Building); various stake closets; BYU Store (access to books on shelves); Deseret Book (access to books on shelves); Provo MTC Teaching Resource Center (Thea Hansen; access to foreign-language books); Church missionaries and employees (Lynda Benson; Diane Bastian; Katie Bastian; Ed Krenicky; Audrey Livingston; Adam Millett); Community of Christ Library and Archives (Rachel Killebrew); Tabernacle Choir at Temple Square (Richard Elliott; John Longhurst; Clay Christansen; Ed Riding); BYU Print and Mail (cross-reference chart for Russian/Ukrainian); Hymnary; Pioneer Book (Provo, Utah); Confetti Books (Spanish Fork, Utah); Eborn Books (Provo, Utah); Benchmark Books (Salt Lake City, Utah); The Book Garden (Bountiful, Utah); OldBookMan (Bates City, Missouri); Price Publishing Company (Independence, Missouri);; Ebay; Internet Archive; HathiTrust; Google Books; YouTube; Archive Viewer.

Software libraries: [JavaScript] PDF.js (PDF rendering, Apache License 2.0); Verovio (dynamic sheet music, LGPL-v3 license); WebAudioFont (forked) (MIDI playback, MIT license); abcjs (tune excerpt rendering, MIT license). [Python] Flask (web framework); PyICU (localization tools); nltk (natural language processing); music21 (music parsing).