<!-- end of reflist -->
External links
- NASA Asteroid Radar Research - Radar-Detected Asteroids: 1620 Geographos
- Large amplitude fast rotator (Yahoo Groups)
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend