Helium (Azerbaijani Wikipedia)

Analysis of information sources in references of the Wikipedia article "Helium" in Azerbaijani language version.

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Kapitza, P. "Viscosity of Liquid Helium below the λ-Point". Nature. 141 (3558). 1938. doi:10.1038/141074a0. ISSN 0028-0836.
McFarland, D. F. "Composition of Gas from a Well at Dexter, Kan". Transactions of the Kansas Academy of Science. 19. 1903. doi:10.2307/3624173.
Cady, H. P. "Helium in Natural Gas". Science. 24 (611). 1906. doi:10.1126/science.24.611.344.
Cady, H. P. "Helium in Kansas Natural Gas". Transactions of the Kansas Academy of Science. 20. 1906. doi:10.2307/3624645.

Onnes, H. Kamerlingh (1908) "The liquefaction of helium," Communications from the Physical Laboratory at the University of Leiden, 9 (108) : 1–23.

Kapitza, P. "Viscosity of Liquid Helium below the λ-Point". Nature. 141 (3558). 1938. doi:10.1038/141074a0. ISSN 0028-0836.