Activeness and self education
L.I. Ruvinsky ; [translated from the Russian by Jane Sayer]
Bok Engelsk 1986 L.I. Ruvinskij
| Annen tittel | |
|---|---|
| Utgitt | Moscow : Progress Publishers , c1986
|
| Omfang | 130 p.
|
| Opplysninger | Includes bibliographical references.
|
| Emner |
