1. Photometry of comets;A'Hearn,1984
2. Photometric transformations;A'Hearn,1986
3. Molecular production rates in comet Kohoutek;A'Hearn;Astron. J.,1975
4. Standard stars update;A'Hearn,1987
5. Photometric investigations of comets Bradfield 1987 s and P/Borrelly;Boehnhard;Astron. Astrophys.,1989