| [1a] | Contents. |
| 3-46 | Tables of $G(u_s, u_B)$ function for calculation of surface conductivity of semiconductors. Kužel, R.; Prosserová, I.; Musilová, P. |
| 47-56 | Observations of comets and asteroids at the Kleť observatory in the year 1973. Mrkos, A. |
| 57-61 | Reflections and coreflections in generalized orthomodular lattices. Beran, L. |
| 63-69 | Stable and costable preradicals. Bican, L.; Jambor, P.; Kepka, Tomáš; Němec, P. |
| 71-77 | $\Lambda$, $R$-transitive groupoids. Kepka, Tomáš |
| 79-87 | Extensive varieties. Ježek, J.; Kepka, Tomáš |
| 89-95 | Normal congruence relations on division groupoids. Kepka, Tomáš |