| (171c)-(171j) | Summaries of articles published in this issue. | 
| 171-173 | A necessary and sufficient condition for continuity of additive functions. Smítal, Jaroslav | 
| 174-182 | Sequentially quotient mappings. Boone, James R.; Siwiec, Frank | 
| 183-191 | A set functor which commutes with all homfunctors is a homfunctor. Koubek, Václav; Reiterman, Jan | 
| 192-206 | Hereditary and cohereditary preradicals. Bican, Ladislav; Jambor, Pavel; Kepka, Tomáš; Němec, Petr | 
| 207-210 | Partition of nondenumerable closed sets of reals. Abian, Alexander | 
| 211-217 | Completely prime ideals and idempotents in mobs. Shum, Kar-Ping; Stewart, Patrick N. | 
| 218-238 | Archimedean classes in an ordered semigroup. I. Saitô, Tôru | 
| 239-247 | Archimedean classes in an ordered semigroup. II. Saitô, Tôru | 
| 248-251 | Archimedean classes in an ordered semigroup. III. Saitô, Tôru | 
| 252-258 | Über den Orbitraum Liescher Transformationsgruppen. Gollek, Hubert | 
| 259-269 | Weakly associative lattices and tolerance relations. Chajda, Ivan; Zelinka, Bohdan | 
| 270-272 | Maximal ideals in a semigroup of measures. Chow, Hing Lun | 
| 273-279 | Embedding trees into block graphs. Zelinka, Bohdan | 
| 280-282 | Nonsingular semilattices and semigroups. Johnson, C. S., Jr.; McMorris, F. R. | 
| 283-296 | Distance in graphs. Entringer, Roger C.; Jackson, D. E.; Snyder, D. A. | 
| 297-303 | On the existence of parallel normal vector fields of surfaces in $E^4$. Švec, Alois | 
| 304-311 | On existence conditions for compatible tolerances. Chajda, Ivan; Niederle, Josef; Zelinka, Bohdan | 
| 312-318 | Discontinuous Liapunov functions for differential equations with measurable right-hand sides. Krbec, Pavel | 
| 319-329 | $\ell_1$-continuous partitions of unity on normed spaces. Zahradník, Miloš | 
| 330-338 | $W$-isomorphisms of distributive lattices. Jakubík, Ján |