00518nam a2200181 a 450000500170000000800410001702000150005804100080007308200130008110000180009424500610011226400460017330000240021965000260024365000250026965000260029470000160032020260717091054.0260717s1982    ii            000 0 eng d  a019877124X  aeng04a309.07231 aCasley, D. J.10aData collection in developing countries /cCasley, D. J. 1aMumbai :bOxford University Press,c1982.  axi, 244 p. ; 24 cm. 4aSampling (Statistics) 4aDeveloping countries 4aStatistical services.1 aLury, D. A.