EU Legislation as it Affects Mining : [INFRA 22944 TAIEX Workshop : 30th November - 2nd December 2006] : proceedings of TAIEX Workshop in Tallinn
2006
http://www.ester.ee/record=b2169935*est
Killustiku kaevandamine ja kasutamine : [artiklite kogumik]
Valgma, Ingo
2008
http://www.ester.ee/record=b2358767*est
Mäenduse maine : [artiklite kogumik]
Valgma, Ingo
2009
http://www.ester.ee/record=b2496535*est