1. A class of semigroups embeddable in groups

   • P. G. Trotter

   Research Articles Pages: 1 - 13

2. A categorical approach to invariant means and fixed point properties

   • Marvin W. Grossman

   Research Articles Pages: 14 - 44

3. The Schützenberger group of anH-class in the semigroup of binary relations

   • R. L. Brandon
   • D. W. Hardy
   • G. Markowsky

   Research Articles Pages: 45 - 53

4. The lattice of convex subgroupoids of an ordered groupoid

   • E. Ja. Gabovič
   • G. J. Rubanovič

   Research Articles Pages: 54 - 64

5. Locally compact subgroups of the spectrum of the measure algebra III

   • Charles F. Dunkl
   • Donald E. Ramirez

   Research Articles Pages: 65 - 76

6. On endomorphisms and partial transformations

   • Carlton J. Maxson

   Research Articles Pages: 77 - 80

7. On equationally compact semigroups

   • Walter Taylor

   Research Articles Pages: 81 - 88

8. Bibliographical Items

   Legacy Pages: 89 - 91

9. Research Problems

   BriefCommunication Pages: 92 - 94

10. Idempotents and product representations with applications to the semigroup of binary relations

    • George Markowsky

    Research Articles Pages: 95 - 119

11. The homomorphic image of a Tn-semigroup

    • Alejandro B. Engel

    Research Articles Pages: 120 - 126

12. The structure of bisimple orthodox semigroups as ordered pairs

    • A. H. Clifford

    Research Articles Pages: 127 - 136

13. The structure of bisimple left unipotent semigroups as ordered pairs

    • A. H. Clifford

    Research Articles Pages: 137 - 144

14. Some finiteness conditions on indecomposable operands

    • William R. Nico

    Research Articles Pages: 145 - 153

    

15. Multi-mobs

    • Younki Chae

    Research Announcements Pages: 154 - 159

16. (0,1)-Matrices and semigroups of ring endomorphisms

    • Carlton J. Maxson

    Research Announcements Pages: 160 - 166

    

17. Semigroups of right quotients of a semigroup which is a semilattice of groups

    • C. V. Hinkle Jr.

    Research Announcements Pages: 167 - 173

18. Maximal ideal complements which are subsemigroups

    • J. C. Propes

    Short Notes Pages: 174 - 175

19. The lattice of ideals of a compact semilattice

    • J. W. Stepp

    Short Notes Pages: 176 - 180

20. Dimensionally stable semilattices

    • J. D. Lawson

    Short Notes Pages: 181 - 185

21. Concerning restrictions of Green'sh equivalence

    • J. H. Carruth
    • C. E. Clark

    Short Notes Pages: 186 - 189

22. Compact semitopological inverse Clifford Semigroups

    • John F. Berglund

    Research Articles Pages: 191 - 215

23. Locally testable semigroups

    • Yechezkel Zalcstein

    Research Articles Pages: 216 - 227

24. On a sublattice of the lattice of congruences on a θ-regular semigroup

    • G. R. Baird

    Research Articles Pages: 228 - 235

    

25. Sur les ideaux des demi-groupes nilpotents

    • Thérèse Merlier

    Research Articles Pages: 236 - 242

26. Push-outs and strict projective limits of semilattices

    • Karl Heinrich Hofmann
    • Albert Stralka

    Research Articles Pages: 243 - 261

27. Free inverse semigroups

    • W. D. Munn

    Research Announcements Pages: 262 - 269

28. On O-simple semigroups

    • G. R. Baird

    Short Notes Pages: 270 - 272

29. Minimal group congruence need not be smallest

    • B. M. Schein

    Short Notes Pages: 273 - 276

30. Remark on the smallest semilattice congruence

    • Takayuki Tamura

    Short Notes Pages: 277 - 282

31. Abstracts and bibliographical items

    Abstract Pages: 283 - 284

32. Errors in elements of compact semigroups

    • J. H. Carruth
    • K. H. Hofmann
    • M. W. Mislove

    Survey Article Pages: 285 - 322

33. On the structure of semigroups which are unions of groups

    • R. J. Warne

    Research Articles Pages: 323 - 330

34. Generators for categories of compact irreducible semigroups

    • T. T. Bowman

    Research Articles Pages: 331 - 339

35. The embeddability of an invertible measure

    • Michael J. Fisher

    Research Articles Pages: 340 - 353

36. Semigroups in which a power of each element lies in a subgroup

    • Mohan S. Putcha

    Research Articles Pages: 354 - 361

37. Some subdirectly irreducible idempotent semigroups

    • J. A. Gerhard

    Research Articles Pages: 362 - 369

38. Costability in Sem and TSL

    • Y. W. Lau

    Research announcement Pages: 370 - 372

39. Abstracts and bibliographical items

    Abstract Pages: 373 - 375