519.5 /DAS 9707 21979 21980 21981 21982 21983 21984 21985 21986 21987 21988 22238
Das, N.G. Statistical Methods / N.G. Das. - New Delhi : Tata Mcgraw Hill, 2009 907P. : v.1&2 70083275 * Mathamathics * Statistics *
