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Friedrich Engel (mathematician)
[ar] فريدريش إنجل
[arz] فريدريش انجل
[azb] فریدریش انقل
[ca] Friedrich Engel
[de] Friedrich Engel (Mathematiker)
[es] Friedrich Engel (matemático)
[fa] فریدریش انگل
[fr] Friedrich Engel
[ht] Friedrich Engel
[id] Friedrich Engel (matematikawan)