found: Schrohe, H. Der Kampf der Gegenkönige Ludwig und Friedrich ... 1965:p. vii (Ludwig von Bayern)
found: LC data base, 1-22-85(hdg.: Ludwig IV, der Bayer, Emperor of Germany, 1287-1347)
found: Schardius, S. Ruminatio juris ab augustiss. impp. olim in approbandis confirmandisq[ue] pontificibus ... after 1604:t.p. (Ludovici IV ...)
found: Langer, W.L. An encyclopedia of world history, 1968:index (Louis IV (Wittelsbach), Holy Roman Emperor, King of Germany) p. 1312 (Louis IV (of Bavaria), Holy Roman Emperor 1314-1347)
found: Brockhaus(Ludwig IV der Bayer)
found: Da Prato, A.A.L. L'incoronazione in San Pietro a Roma di Ludovico IV Duca di Baviera ... 199-?
found: Britannica Academic (online), viewed 30 Aug. 2016(Louis IV, byname Louis the Bavarian; b. 1283? Munich; d. Oct. 11, 1347, Munich; duke of upper Bavaria (from 1294) and of united Bavaria (1340-47), German king (from 1314), and Holy Roman emperor (1328-47); elected in double election of 1314 which also elected Frederick III; accepted imperial crown in Rome, Jan. 11, 1328)
found: Deutsche Biographie (online), viewed 30 Aug. 2016(Ludwig der Bayer; b. probably end of 1281/beginning of 1282; d. 11 Oct. 1347 in Puch near Fürstenfeldbruck; emperor from 1328)
found: Wikipedia, 30 Aug. 2016(Louis IV, Holy Roman Emperor; b. 1 April 1282; d. 11 Oct. 1347; King of the Romans from 1314; Holy Roman Emperor from 1328; infobox: b. April 5, 1282, Munich)
found: Ludwig IV., der Bayer: Herzog, König, Kaiser, 2014:p. 24-25 (year of birth uncertain; research points to various dates: 1282, 1283, 1286, 1287; Waldemar Schlögl argues for spring 1282, and most research follows him)
