IHW Organization
| Title | IHW Organization |
| Category | Comets |
| Sub-Category | Halley Stamps, Organisation |
| Description | International Halley Watch Organization |
| Copyright | © Sir Patrick Moore |
| Keywords | halley's comet |
| Index Reference | a330 |
| Title | IHW Organization |
| Category | Comets |
| Sub-Category | Halley Stamps, Organisation |
| Description | International Halley Watch Organization |
| Copyright | © Sir Patrick Moore |
| Keywords | halley's comet |
| Index Reference | a330 |
