Gupta, C. B. An Introduction to statistical methods / C. B. Gupta & Vijay Gupta. - 22nd rev. ed. - New Delhi : Vikas Publishing House, 2001. - x, 807 p. ; 22 cm. ISBN: 8125911103 : KES 750 Subjects--Topical Terms: Statistics. LC Class. No.: HA29 / .G87 2001