00635naa#a2200193#i#450# EN\\bibl\46999 20251218011202.4 1681-1208 20070825b2007####ek#y0engy0150####ca RU Two spinel populations from the Cretaceous-Paleogene K/T boundary clay layer in the Gams stratigraphic sequence, Eastern Alps Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2007 10 с. Journal article local Grachev A F Tselmovich V A Korchagin O A Kollmann H A www.rjes.ru