Caspian and Aral Seas and Lake Issyk (1936-1963) - (1969-1978)

1968 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1963 1962 1961 1960 1959 1958 1957 1956 1955 1954 1953 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943 1942 1941 1940 1938-1939 1936-1937