information (1) Leningrad (1) Correspondence (1) Archives (1) Correspondence (1) Archives (1) Praise (1) Mechanical drawing (1) Maps (1) Manuscripts (1) Letters (1) Letter writing (1) Geometrical drawing (1) December (1) Correspondence (1) Archives (1) Architectural drawing (1) Addition (1) Manuscripts (1) October (1) fille (1)