| [1] | Contents. |
| 3-52 | The efficiency factors $Q_{\text{ext}}$ and $Q_{\text{scat}}$ of the core-mantle grains in the infrared region 2 - 3.4 $\mu$. Svatoš, J.; Sekanina, Z. |
| 53-56 | The lifetime of C$_2$ and CN molecules in cometary atmospheres. Vanýsek, V. |
| 57-106 | Determination of Fermi level and some parameters of semiconductors from measurements of transport properties. Kužel, R. |