[Ýíöèêëîïåäè÷åñêèé Ñëîâàðü ]
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[Áèáëèîòåêà «Âåõè»]
Ãàíêåëü (äîïîëíåíèå ê ñòàòüå)
(Wilhelm-Gottl ieb Hankel) — íåì. ôèçèê; óì. â 1899 ã.
[Ýíöèêëîïåäè÷åñêèé Ñëîâàðü ]
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[Áèáëèîòåêà «Âåõè»]