P/Halley dust coma: Grains or rocks?

P/Halley ionosphere and spatial distribution of some constituents

P/Halley's Light Curve: Some Initial Thoughts

P/Halley: characterization of the coma dust by polarimetry.

P/Halley: Spatial distribution and scale lengths for C2, CN, NH2, and H2O

P/Helfenzrieder (1766 II) and the Hephaistos group of Earth-crossing asteroids

P/Machholz 1986 8 and quadrantid meteoroid stream. Orbital evolution and relationship

P/Machholz 2: de "millennium"-komeet?

P/S-L9 Related Observations of the Io Plasma Torus

P/Schwassmann-Wachmann 1.

P/Schwassmann-Wachmann 1: Radio Observations of Carbon Monoxide and the Explanation of its Distant Activity

P/Shoemaker-Levy 1993e: A Time-dependent Coma Development Model

P/Shoemaker-Levy 7 (1991d1).

P/Shoemaker-Levy 9 Impact: Observations at the Pico-dos-Dias Observatory

P/West-Hartley (1989 k)

P/Wirtanen thermal evolution: effects due to the presence of an organic component in the refractory material

P1-bundles over projective manifolds of Picard number one which admit another smooth morphism of relative dimension one

P11 Resonances with Dubna-Mainz-Taipei Dynamical Model for pi-N Scattering and Pion Electromagnetic Production

P13

P14