found: His Martyrilogium Usuardi monachi, 1515:t.p. (... Usuardi monachi)
found: ISTC, viewed on May, 2024(Jacobus de Voragine: Legenda aurea sanctorum, sive Lombardica historia [Dutch] Passionael: Winter- ende Somerstuc. Add: Usuardus: Martyrologium [Dutch]) - https://data.cerl.org/istc/ij00140500 found: Hoefer(Usuard, French hagiographer; d. 1-13-876 or 877)
found: LC PREMARC file, 10-28-86(hdg.: Usuard, d. ca. 875)
found: NUC pre-1956(Usuard, d. ca. 875)
found: BN(Usuard, moine bénédictin de Saint-Germain-des-Pres)
found: Kapsner, O. Benedictine bibliography(Usuard, monk of St.-Germain-des-Prés, d. ca. 875)
found: Grande encycl.(Usuard or Husward (Usuardus, Husardus); French benedictine of 9th cent.; d. 1-13-876 or 877)
found: English Wikipedia, viewed May 24th, 2024(Usuard (died 23 January 875) was a Benedictine monk at the Abbey of Saint-Germain-des-Prés and a Carolingian scholar, Usuard is the author of a martyrology dedicated to Charles the Bal, the dedication seems to only briefly precede the death of the author; the martyrology of Usuard enjoyed consistent success throughout the Middle Ages, as evidenced by numerous surviving manuscripts; he also composed an obituary of the abbey of Saint-Germain-des-Prés, the oldest of its kind) - https://en.wikipedia.org/wiki/Usuard found: Katalog der Deutschen Nationalbibliothek, viewed May 24th, 2024(Usuard (died approximately 875) other name variants (selection): Usuardus Sangermanensis, Huswardus Monachus, Usuard de Saint-Germain-des-Prés) - https://d-nb.info/gnd/118775359
