Põhja-Kiviõli II open-pit mineBauert, Heikki; Hints, OlleXI Baltic Stratigraphical Conference : abstracts and field guide2024 / p. 83-90 : ill https://www.ester.ee/record=b5696260*est https://files.geocollections.info/953ae0f9-eed2-447d-82d9-fd90a199216b.pdf