Astronomy Magazine
Years 1973-1978, plus two

1973 - Initial issues, Aug - Dec
1974 - Jan - Jun
1974 - Jul - Dec
1975 - Jan - Jun
1975 - Jul - Dec
1976 - Jan - Jun
1976 - Jul - Dec
1977 - Jan - Jun
1977 - Jul - Dec
1978 - Jan - Jun
1978 - Jul - Dec
1979 - Jan and May