Eusebius Mandyczewski

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
• …