1976-1980

1976 01 jan febr 1976 3 fall 1976 03 march 1976 05 may june
1977 1 spring 1977 2 summer 1977 4 winter1 1977 4 winter2
1978 1 spring 1978 2 summer 1978 3 fall 1978 4 winter
1979 1 spring 1979 2 summer 1979 3 fall 1979 4 winter
1980 1 spring 1980 2 summer 1980 3 fall