Íly a ílové minerály

AIPEA International Association for the Study of Clays  visit website

The Clay Minerals Society   visit website

Croatian Geological Society - Clay Group  visit website

Czech National Clay Group  visit website

German-Austrian-Swiss Clay Group  visit website

The Mineralogical Society of Great Britain and Ireland - Clay Minerals Group  visit website

Polish Clay Group  visit website

Iné súvisiace oblasti

The International Mineralogical Association  http://www.ima-mineralogy.org/

The International Union of Geological Sciences  http://www.iugs.org/

The International Zeolite Association  http://www.iza-online.org/

The Mineralogical Society of America  http://www.minsocam.org/

U.S. Geological Survey  http://www.usgs.gov/