- Author: V.P. Mijailov
- Language: Spanish
- Year: 1978
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- Language: Spanish
- Year: 1983
- Author: Boris Borisovich Damaskin
- Language: Spanish
- Year: 1981
- Author: D. Kletenik
- Language: Spanish
- Year: 1968
- Author: M. L. Krasnov A.I. Kiseliov G.I. Makarenko
- Language: Spanish
- Year: 1981
- Author: G. E. Shilov
- Language: Spanish
- Year: 1984
- Author: V. Ilin E. Pozniak
- Language: Spanish
- Year: 1991
- Author: I. M. Sobol
- Language: Spanish
- Year: 1983
- Author: I. Radunskaya
- Language: Spanish
- Year: 1975