Report of investigations.

no.1-2 (1934-33); no.3 (1942); no.4-5 (1944); no.6 (1948); no.7; no.8; no.9; no.10; no.11; no.12; no.13; no.14; no.15; no.16; no.17; no.18; no.19; no.20; no.21; no.22; no.23; no.24; no.24 (1961); no.25; no.26; no.26 (1962); no.27; no.28; no.29; no.30; no.31; no.32; no.32 (1963); no.33; no.33 (1963); no.34; no.34 (1964); no.35; no.36; no.37; no.38; no.39; no.40; no.41-45; no.41-49 (1965-67); no.46-53