- Author: Четыркин E. М.
- Language: Русский
- Year: 2009
- Author: Четыркин Е.М. Васильева Н.Е.
- Language: Русский
- Year: 1990
- Author: Четыркин Б.М.
- Language: Русский
- Year: 2000
- Author: Четыркин Е.М.
- Language: Русский
- Year: 2004
- Author: Четыркин Е.М.
- Language: Русский
- Year: 1977
- Author: Четыркин Е.М.
- Language: Русский
- Author: Четыркин Е.М.
- Language: Русский
- Year: 1995
- Author: Четыркин Е. М.
- Language: Русский
- Year: 2002
- Author: Четыркин Е.
- Language: Русский