00470nam a22001697a 4500003000400000005001700004008004100021020001500062040000800077082002100085100002400106245004800130250001000178260004200188300001100230650005900241OSt20160217140550.0030206s2002    ck            000 0 spa d  a047116240X  cOSt04221a519.52bC634  aCochran, William G.00aSampling techniques / cCochran, William G.  a3 ed.  aNew York: bJohn Wiley & Sons,c1977.  a428 p.042LEMBxMUESTREO (ESTADÍSTICA) / I SAMPLE (STATISTICS)