by H. S. Brunnert and V. V. Hagelstrom ; revised by N. Th. Kolessoff ; translated from the Russian with the authors' sanction by A. Beltchenko and E. E. MoranCh'eng Wen Publishing1971
by H. S. Brunnert and V. V. Hagelstrom ; revised by N. Th. Kolessoff ; translated from the Russian with the authors' sanction by A. Beltchenko and E.E. MoranKelly and Walsh1912