We can found different death dates for this Ukrainian artist over Internet. Year and day are always the same, only month differs: *en.wikipedia.org, it.wikipedia.org, es.wikipedia.org … → 1929-08-13 *de.wikipedia.org, uk.wikipedia.org, pl.wikipedia.org, ro.wikipedia.org … → 1929-07-13 *fr.wikipedia.org … → 1929-03-13 However, the correct month seems to be '''July''', since other sources always mention '''1929-07-13''': *www.hyperion-records.co.uk/c.asp?c=C1149 *agso.uni-graz.at/marienthal/biografien/mandyczewski_eusebius.htm *www.aeiou.at/aeiou.encyclop.m/m089171.htm *tools.wmflabs.org/persondata/p/Eusebius_Mandyczewski *data.bnf.fr/14809425/eusebius_mandyczewski *de.wikisource.org/wiki/Eusebius_Mandyczewski *…