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Latvijas PSR Zinātņu akadēmija (1)
Radioastrofizikas observatorija (1)SubjectAstrofizika (1)
Astronomi (1)
Astronomija (1)Astronomijas vēsture (1)Komētas (1)Kosmonautika (1)Kvazāri (1)Miglāji (1)NATURAL SCIENCES (1)Planētas (1)... View MoreDate Issued
1969 (1)