Szukana fraza: [Opis = "Examination was made of variability in body and skull dimensions in a population of ther root vole Microtus oeconomus \(Pallas, 1776\) living in a drained sphagnum bog in the Augustów Forest \(eastern Poland\). Analysis was made of material consisting of 2424 individuals caught over an 9\-year period \(1966\-1974\), taking into consideration sex dimorphism, differences in seasonal generations and relation to dynamics of population numbers."]