[Research report] /

no.1-12 1917-1918; no.1-4 1917/1918; no.1 - 10 (1917-1918); v.1-10 (1917-18); no.5-8 1918; v.2-23 (1917-19); no.11 - 20 (1918-1919); v.11-20 (1918-19); no.13-22 1919; no.13-16 1919; no.17-20 1919; no.21-24 1919; no.21 - 30 (1919-1920); no.23-33 1919-1920; v.21-30 (1919-20); v.21-28 (1919-20); no.33-36 1920/1921; v.24-43 (1920-21); v.31-40 (1920-21); no.35-42 1921; no.37-40 1921; no.41-42 1921; no.41 - 45 (1921); v.35-41 (1921); v.41-45 (1921); v.42-45 (1921); no.43-49 1921-1922; no.47-51 yr.1922; no.50 1922; no.51-55 1922; no.51 - 53 (1922); no.52-57 yr.1922; v.44-57 (1922); v.46-50 (1922); v.51-54 (1922); no.53; no.54 - 60 (1922-23); no.56-60 1922-1923; no.61-65 1923; no.66-71 1924