| 1-9,10 | Concerning congruences on symmetric inverse semigroups. Scheiblich, H. E. |
| 11-14 | On minimal sequences of type $l_+$ and bounded biorthogonal systems in Banach spaces. Singer, Ivan |
| 15-23 | Open and proper maps between convergence spaces. Kent, Darrell C.; Richardson, Gary D. |
| 24-29 | Duality and algebraically irreducible semigroups. Rothman, Neal J. |
| 30-33 | Über die Kategorie der Menge stetiger Funktionen, welche Differentialgleichungen ohne Eindeutigkeit bestimmen. Janda, Jaroslav |
| 34-44 | On manifolds with connection. Kolář, Ivan |
| 45-49 | Equicontinuous commutative semigroups of onto functions. Husch, Lawrence S. |
| 50-56 | Meromorphisms of graphs. Zelinka, Bohdan |
| 57-73 | Mittlere Darstellungen natürlicher Zahlen als Summe von $n$ $k$-ten Potenzen. Krätzel, Ekkehard |
| 74-85 | Vertices of space curves. Šmakal, Stanislav |
| 86-94 | Curves of constant breadth. Šmakal, Stanislav |
| 95-122 | Mixed problem for semilinear hyperbolic equation of second order with Dirichlet boundary condition. Doktor, Alexander |
| 123-124 | On a theorem on the change of base point in a path connected space. Troué, Jacques |
| 125-138 | Center of a complete lattice. Jakubík, Ján |
| 139-150 | Closed and open sets in topologies induced by lattice ordered vector groups. Šik, František |
| 151-163 | The semigroup of fully indecomposable relations and Hall relations. Schwarz, Štefan |
| 164-174 | On $\sigma$-complete lattice ordered groups. Jakubík, Ján |
| 175 | News and Notices. |
| (176),(177),(178) | Summaries of articles published in this issue. |