Varentsov, M. - Grasselly, M. (szerk.): Manganese on the bottom of recent basins - Geology and geochemistry of manganese 3. (Budapest, 1980?)
GEOLOGY и“ GEOCHEMISTRYOF MANGANESE MANGANESE ON THE BOTTOM OF REGENT BASINS Edited by I. M. VARENTSOV and GY. GRASSELLY AKADÉMIAI KIADÓ BUDAPEST