Mustapayeva Sn 1

1. An Uppermost Famennian section with ammonoids in Karaganda Region, Central Kazakhstan
2. Paleontological studies of the Devonian-Carboniferous boundary beds of Berchogur (Western Kazakhstan): possibilities of global correlation
3. Progress in the study of the Devonian–Carboniferous boundary sections in the Berchogur Depression (Mugodzhary Mountains, western Kazakhstan)
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