Archive
The USSR Academy of Sciences
USSR AS Election (1979)
Candidates for corresponding membership, SB AS vacancy (1979)
Confirmation certificate, 26.12.1978
Letter, A. A. Trofimuk->A.P. Ershov, 28.12.1978
Letter, A. S. Alekseev->A.P. Ershov..., 04.01.1979

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