"Sols gel©♭s Recherche." . . "Périglaciaire Russie." . . "Cryop©♭dologie." . . "Cryopédologie." . . "Geocryologie." . . "Dauerfrostboden." . . "Sols gel©♭s." . . "Frostboden." . . "Sols gelés." . . "Périglaciaire." . . "Frozen ground." . . . . "General geocryology" . . "General geocryology"@en . "Electronic books"@en . . . . . . . . . . . . . . . . . . "Obshchaya geokriologiya" . . . . . . . . . . . . . . . . . . . . . . "General Geocryology" . "frostvirkninger" . . . . "Frozen ground Research." . . "Sols Gel." . .