1. Topological representation of algebras;Arens;Trans. Amer. Math. Soc.,1948
2. C. J. Ash, ℵ0-categorical theories, to appear.
3. Lattice Theory;Birkhoff,1940
4. Omitting types of prenex formulas;Chang;J. Symbolic Logic,1967
5. S. D. Comer, Elementary properties of structures of sections, to appear.