Algebra Logika, 1991, Volume 30, Number 4

Algebra i logika

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1991, Volume 30, Number 4

	The structure of finite lattices of subsemilattices K. V. Adaricheva		385–404
	On the upper semilattice of recursively enumerable ${\rm sQ}$-degrees R. Sh. Omanadze		405–413
	Semantically universal classes of models M. G. Peretyat'kin		414–431
	On generalizations of purity N. A. Serdyukova		432–456
	Decidability of the elementary theories of some finitely presented algebras L. V. Shabunin		457–476
	One-dimensional subalgebras of a Bernstein algebra S. González		477–504
	Sessions of the seminar “Algebra i Logika”		505