Bulletin Samara State Agricultural AcademyBulletin Samara State Agricultural Academy1997-32252782-4225Samara State Agrarian University23919YODOOBESPEChENNOST': SOSTOYaNIE, ZADAChI, TsELIDulovM I-KrutyaevaE V-15122006412913111032020Copyright © 2006, Dulov M.I., Krutyaeva E.V.2006