| (171c),(171d),(171e) | Summaries of articles published in this issue. |
| 171-175 | On $n^\circ $-regular semigroups. Kapp, Kenneth M. |
| 176-191 | Completely decomposable abelian groups any pure subgroup of which is completely decomposable. Bican, Ladislav |
| 192-218 | Epi-archimedean groups. Conrad, Paul F. |
| 219-246 | On some invariants of unary algebras. Kopeček, Oldřich; Novotný, Miroslav |
| 247-251 | Circulant Boolean relation matrices. Butler, Kim Ki-Hang; Krabill, James Richard |
| 252-253 | Circulant Boolean relation matrices. Schwarz, Štefan |
| 254-256 | Spitz in $l$-groups. Pedersen, F. |
| 257-269 | Splitting property of lattice ordered groups. Jakubík, Ján |
| 270-283 | Non-analytic local functional calculus. Foiaş, Ciprian; Vasilescu, Florian-Horia |
| 284-291 | Oscillation of solutions of delay differential equations. Marušiak, Pavol |
| 292-300 | Remarks on regular factors of regular graphs. Plesník, Ján |
| 301-310 | Construction of a net without transversals over a non-planar near-field. Kadleček, Jiři |
| 311-330 | Some higher order operations with connections. Kolář, Ivan |
| 331-340 | News and Notices. Sixtieth anniversary of the birthday of Academician Štefan Schwarz. Jakubík, Ján; Kolibiar, Milan |