luso zakumapeto

Chigawo chimenechi chidzachitika njira masamu kuti zosankhidwazi ndi chiwerengero cha ku Mwina ndipo sanali Mwina zitsanzo. Iwo adzayandikira pa Särndal, Swensson, and Wretman (2003) ndi Särndal and Lundström (2005) .