Classes of Abelian groups closed under taking subgroups and direct limits Paul Hill OriginalPaper Pages: 63 - 70
The spectrum of some classes of free universal algebras Robert M. Vancko OriginalPaper Pages: 46 - 53
On the structure of the lattice of equational classes ℒ (τ) Stanley Burris OriginalPaper Pages: 39 - 45
On semigroups whose proper subsemigroups have lesser power Ralph McKenzie OriginalPaper Pages: 21 - 25
