K.N. Igumnov together with his pupils. N.G. Igumanov, G.D. Bublikov, T.S. Levit, K.S. Sorokin, Ya. I. Milstein, A.L. Joheles, Ya.V. FLiere, T.L. Logovinsky (1930).

K.N. Igumnov together with his pupils. N.G. Igumanov, G.D. Bublikov, T.S. Levit, K.S. Sorokin, Ya. I. Milstein, A.L. Joheles, Ya.V. FLiere, T.L. Logovinsky (1930).