Fayl:Hermann von Helmholtz.jpg

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Hermann von Helmholtz

Practical Physics published 1914

Macmillan and Company

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	Sana/Vaqt	Miniatura	Oʻlchamlari	Foydalanuvchi	Izoh
joriy	08:53, 2012-yil 29-mart		338 × 440 (42 KB)	Materialscientist	better version from http://www.corbisimages.com/stock-photo/rights-managed/IH015189/hermann-ludwig-ferdinand-von-helmholtz
	20:00, 2005-yil 11-mart		255 × 332 (20 KB)	-xrydz-	# {{PD-US}}