M. I. Sumgin1873 – 1942BooksLaboratornye issledovani͡ia mekhanicheskikh svoĭstv merzlykh gruntovSbornik instrukt͡siĭ i programmnykh ukazaniĭ po izuchenii͡u merzlykh gruntov i vechnoĭ merzlotyVechnai͡a merzlota pochvy v predelakh SSSRAuthor data: Open Library