Gupta, C. B. An introduction to statistical methods / C. B. Gupta. - 8th rev. ed. - New Delhi : Vikas Pub. House, © 1979. - Various p. : ill. ; 22 cm. 310 310 ISBN: 0 7069 0460 5 Subjects--Topical Terms: Statistics. Dewey Class. No.: 311 / G959i