Gelmgolts G. L. F. Dzhon Tindal. Zakon sokhraneniya sily Populyarnye lektsii. Teplo i kholod. Materiya i sila. Sila: S dopolneniyami Rechi i stati Dzhona Tindalya. Konvolyut iz trekh knig./Helmholtz G. L. F. John Tyndall: The Law of Power Preservation Popular Lectures. Heat and Cold. Matter and Power. Strength: Supplemented by John Tyndalls Speech and Article. A Three-Book Convolutee. In Russian - landofmagazines.com

TransliterationGelmgolts G. L. F. Dzhon Tindal. Zakon sokhraneniya sily Populyarnye lektsii. Teplo i kholod. Materiya i sila. Sila: S dopolneniyami Rechi i stati Dzhona Tindalya. Konvolyut iz trekh knig.

In EnglishHelmholtz G. L. F. John Tyndall: The Law of Power Preservation Popular Lectures. Heat and Cold. Matter and Power. Strength: Supplemented by John Tyndalls Speech and Article. A Three-Book Convolutee. In Russian

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