1. Chemical abundances in comets;A'Hearn,1981
2. Vaporization in comets: The icy grain halo of comet West;A'Hearn;Moon Planets,1980
3. Spectrophotometry of comet Kohoutek (1973 ƒ = 1973 XII);A'Hearn;Astron. J.,1975
4. Abundance correlations among comets;A'Hearn;Astron. J.,1980
5. Evaporation of ices from comet West;A'Hearn;Astron. J.,1977