=LDR 22 4500 =001 6225 =082 04$a519.58 SPI =100 1\$aSpiegel, Murray R. =245 10$aTheory and Problems of Statistics =260 \\$aNew York :$bMcGraw-Hill Book Company,$c1961 =650 \0$aBooks =852 \\$bGeography Basement$h519.58 SPI