Reference population levels in Baltic seals (Meeting document 7.1/1 for Second Meeting of Ad hoc HELCOM Seal Expert Group (HELCOM SEAL 2/2008), 11-13 March, 2008. Helsinki, Finland) - Härkönen, T.; Svensson, C.J.; Eriksson, A.; Härkönen, S.; Harding, K. (FI, 2008)
Keywords: hylkeet; luonnonsuojelu