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Message * Bioraznoobrazie, Okhrana i Rat︠s︡ionalʹnoe Ispolʹzovanie Rastitelʹnykh Resursov Severa Materialy Xi Perfilʹevskikh Nauchnykh Chteniĭ, Posvi︠a︡shchennykh 125-Letii︠u︡ So Dni︠a︡ Rozhdenii︠a︡ Ivana Aleksandrovicha Perfilʹeva (1882--1942), 23--25 Mai︠a︡ 2007 G. - 5261003253 - 9785261003250