Bibliography (all years)

41 - 1930
42 - 1931
43 - 1932
44 - 1933
45 - 1934
46 - 1935
47 - 1936
48 - 1937
49 - 1938
50 - 1939

51 - 1940
52 - 1941
53 - 1942
54 - 1943
55 - 1944
56 - 1945
57 - 1946
58 - 1947
59 - 1948
60 - 1949

61 - 1950
62 - 1951
63 - 1952
64 - 1953
65 - 1954
66 - 1955
67 - 1956
68 - 1957
69 - 1958
70 - 1959

71 - 1960
72 - 1961
73 - 1962
74 - 1963
75 - 1964
76 - 1965
77 - 1966
78 - 1967
79 - 1968
80 - 1969