Earthquakes.com
Earthquakes.com
http://earthquakes.com/
El Nino
Noaa and el nino: noaa's role in studying, predicting and mitigating the el nino southern oscillation (enso) phenomenon
http://www.elnino.noaa.gov/
Watersnoodramp 1953
Verzameling van krantenberichten
http://members.tripod.com/~griffioen/watersnood.htm