Hydrological conditions in the salmon riversVassiljev, AnatoliPresent and potential production of salmon in Estonian rivers2001 / p. 11-14 : ill Migration obstaclesVelner, Harald-AdamPresent and potential production of salmon in Estonian rivers2001 / p. 14-15 Pollution sources and load on riversBlinova, Irina; Iital, ArvoPresent and potential production of salmon in Estonian rivers2001 / p. 15-21 Water qualityLoigu, Enn; Leisk, Ülle; Hannus, Maila; Blinova, IrinaPresent and potential production of salmon in Estonian rivers2001 / p. 21-35 : ill