| 515-522 | Eine Bemerkung zum Kardinalprodukt. Skula, Ladislav | 
| 523-527 | О дизъюнктно полных архимедовых полуупорядоченных группах. Rotkovič, G. Ja. | 
| 528-544 | Semigroup structure in compactifications of ordered semigroups. Pym, John S.; Vasudeva, Harkrishan L. | 
| 545-551 | Pairwise splitting lattice-ordered groups. Martinez, Jorge | 
| 552-555 | A generalization of a theorem of Boolean relation matrices. Chao, Chong-Yun; Winograd, Shmuel | 
| 556-559 | Families of sets and functions. Solomon, R. C. | 
| 560-572 | Erweiterte lokale Ternärringe. Machala, František | 
| 573-590 | Koordinatisation projektiver Ebenen mit Homomorphismus. Machala, František | 
| 591-597 | On a conjecture of the semigroup of fully indecomposable relations. Chao, Chong-Yun | 
| 598-608 | Decompositions of graphs and hypergraphs into isomorphic factors with a given diameter. Tomasta, Pavel | 
| 609-616 | Functional approach to the Brelot-Keldych theorem. Lukeš, Jaroslav | 
| 617-618 | A remark on systems of maximal cliques of a graph. Zelinka, Bohdan | 
| 619-625 | Near reflections. Srivastava, Arun K. | 
| 626-643 | Topological categories containing any category of algebras. Reiterman, Jan; Trnková, Věra | 
| 644-662 | Asymptotic properties of derivatives of central dispersions of the $k$-th kind for the differential equation $y''=q(t)y$. Staněk, Svatoslav | 
| 663-671 | Lattice endomorphisms of $2^X$. Maxson, Carlton J.; Natarajan, Ponnammal | 
| 672 | Correction to my paper: “Uniformly distributed sequences mod 1 and Cantor's series representation”. Galambos, János | 
| 673-(678) | Summaries of articles published in this issue. |