Simmetriya v prirode
Subtitle: tezisy dokladov k soveshchaniyu 25-29 maya 1971 g.
By: [otv. redaktor: I. Dragunov].
Publisher: PKOP
Published: 1971
Place of publication: Leningrad
Language: rus
Notes: At head of title: Leningradskoe obl. pravlenie nauch.-tekh. gornogo obshchestva.