Kata Kunci Pencarian:
- Herman Robert Woltjer
- Daftar Rektor Institut Teknologi Bandung
- Technische Hoogeschool te Bandoeng
- Perbudakan
- Willem Boomstra
- Observatorium La Silla
- Johannes Wilhelmus Franciscus Cornelis Proper
- Jan Jacob Iman Sprenger
- Jacob Claj
- Observatorium Selatan Eropa
- Jan Woltjer
- Jan Woltjer (classical scholar)
- Woltjer (crater)
- Lodewijk Woltjer
- Woltjer's theorem
- Jan Woltjer (astronomer)
- List of minor planets: 1001–2000
- Johann Heinrich Diemer
- Meanings of minor-planet names: 3001–4000
- Pulsar
