Purposes Of IHW
| Title | Purposes Of IHW |
| Category | Comets |
| Sub-Category | Halley Stamps, Organisation |
| Description | Purposes of International Halley Watch |
| Copyright | © Sir Patrick Moore |
| Keywords | halley's comet |
| Index Reference | a329 |
| Title | Purposes Of IHW |
| Category | Comets |
| Sub-Category | Halley Stamps, Organisation |
| Description | Purposes of International Halley Watch |
| Copyright | © Sir Patrick Moore |
| Keywords | halley's comet |
| Index Reference | a329 |
