Chowdury, Fatema Essentials of number theory / Fatema Chowdury. - 1st ed. - Dhaka : Pi Publications, 2005. - iv, 224 p. : ill. ; 24 cm. Includes bibliographical references and index. ISBN: 9843228367 Subjects--Topical Terms: Number theory.Algebra. Dewey Class. No.: 512.7