Mańkowski, D. R. .; Kozdój, J.; Janaszek-Mańkowska, M. STRUCTURAL EQUATION MODEL AS A TOOL TO ASSESS THE RELATIONSHIP BETWEEN GRAIN YIELD PER PLANT AND YIELD COMPONENTS IN DOUBLED HAPLOID SPRING BARLEY LINES (HORDEUM VULGARE L.) . pb&ss 2016, 73, 63-77.