m.laivins@inbox.lv
guntac@inox.lv
andamedene@inbox.lv
janis.donis@silava.lv
© 2014 Māris Laiviņš, Gunta Čekstere, Anda Medene, Jānis Donis, published by Latvian Academy of SciencesThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.