Jacob Theodor Klein
[ar] ياكوب كلاين
[arz] جاكوب كلاين
[de] Jacob Theodor Klein
[es] Jacob Theodor Klein
[fr] Jacob Theodor Klein
[gl] Jacob Theodor Klein
[ht] Jacob Theodor Klein
[hu] Jacob Theodor Klein
[it] Jacob Theodor Klein
[pl] Jacob Theodor Klein