Thomsonite Subgroup from
Iceland | |
| Betz, Volker (1981) Famous mineral localities: Zeolites from Iceland and the Faeroes. The Mineralogical Record, 12 (1) 5-26 |
| Personally collected by Günter Frenz |
Sæmundsson, K. & Gunnlaugsson, R. (1999) Icelandic Rocks and Minerals. Mál og menning, Reykjavik 1999 (2nd Edtiotion 2004) |