1
Conference on clay mineralogy and petrology. 0010 : Ostrava, 26.08.86-29.08.86.
Book
Konta, J.
1988
...GHA - Petrology - general...
2
Coal and coal bearing strata: recent advances : International Symposium on Coal and Coal Bearing Strata: keynote adresses and invited papers :London, 08. 1-. April 1986 /
Book