الفهرس 
Economic importance of land molluscsOnly 14 pages are availabe for public view
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Abstract
This thesis contains the following topics (1) Constructing new types of near con~pactificaticms (semi, strong) and studying many of their properties. (2) Initiating a generalization for Stone spaces using Boolean Algebras. (31 Investigating and introducing an analogue for stone-&ch corn pactification using (i, 5)k concepts. Y [4) Generalizing the notions of near open sets and near continuity in bispaces using an (i, J)h operation. 7f (5) introducing Supracomp8ctification of bispaces and applying order relations for constru~thgn ew types of compactifications.