Chowdhury, Fatema Essentials of number theory / Fatema Chowdhury. - 1st ed. - Dhaka: Pi, c2005. - vi, 224p.: ill.;, figs.;, tables;, maps.; 24cm. Includes bibliography (p. 222) and index. Dept. of CSE ISBN: 9843228367 Subjects--Topical Terms: Congruences Dewey Class. No.: 512.7 / CHE