00322nam a2200121 a 450000500170000002000150001708200160003210000160004824500490006426000430011330000240015670000200018020251203110751.0  a0852269102  a519.52bSIN  aDargo Singh  aTheory and Analysis of Sample Survey Designs  aNew DelhibNew age internationalc1986  axi,380p.c24 cm. PB  aChoudhary, F.S.