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- Language: Русский
- Year: 2007

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- Language: Русский
- Year: 2007

- Author: Prabhat Kumar
- Language: English
- Year: 2017

- Author: Prabhat Kumar
- Language: English
- Year: 2017

- Author: R.L. Madan G.D. Tuli
- Language: English
- Year: 2007

- Author: Смитъ Александръ
- Language: Русский(Old)
- Year: 1916

- Author: Prabhat Kumar
- Language: English
- Year: 2017

- Author: Prabhat Kumar
- Language: English
- Year: 2017

- Author: CSV Competition Science Vision
- Language: English
- Year: 2009

- Author: Atul Singhal
- Language: English
- Year: 2018