Current science.

v.1 1932-1933; v.4 1935-1936; v.5 1936-1937; v.6 1937-1938; v.7 1938; v.8 1939; v.9 1940; v.10 1941; v.11 1942; v.12 1943; v.13 1944; v.14 1945; v.15 1946; v.15-16 (1946-47); v.16 1947; v.17 1948; v.17-18 (1948-49); v.18 1949; v.19-20 (1950-51); v.21-22 (1952-53); v.23-24 (1954-55); v.25 (1956); v.26 (1957); v.27 (1958); v.28 (1959); v.29 (1960); v.30 (1961); v.31 (1962); v.32 (1963); v.33 (1964); v.34 (1965); v.35 (1966); v.36:1-12 (Jan-June 1967); v.36:13-24 (July-Dec 1967); v.37:1-12 (Jan-June 1968); v.37:13-24 (July-Dec 1968); v.38:1-12 (Jan-June 1969); v.38:13-24 (July-Dec 1969); v.39:1-12 (Jan-June 1970); v.39:13-24 (July-Dec 1970); v.40:1-12 (Jan-June 1971); v.40:13-24 (July-Dec 1971); v.41:1-12 (Jan-June 1972); v.41:13-24 (July-Dec 1972); v.42:1-12 (Jan-June 1973); v.42:13-24 (July-Dec 1973); v.45 (1976); v.46 (1977); v.47 (1978); v.48:1-12 (Jan-June 1979); v.48:13-24 (July-Dec 1979); v.49 (1980); v.50:1-12 (Jan-June 1981); v.50:13-24 (July-Dec 1981); v.51:1-12 (Jan-June 1982); v.51:13-24 (July-Dec 1982); v.53:1-12 (Jan-June 1984); v.53:13-24 (July-Dec 1984; v.54:1-12 (Jan-June 1985); v.54:13-24 (July-Dec 1985; v.55:1-12 (Jan-June 1986); v.55:13-24 (July-Dec 1986; v.56:1-12 (Jan-June 1987); v.56:13-24 (July-Dec 1987; v.57:1-12 (Jan-June 1988); v.58:1-12 (Jan-June 1989)