Found in articles
Cuchlaine; Landforms and Geomorphology: Concepts and History, Wiley, 1976 ISBN 978-0470150542 Rice, R. J.; Fundamentals of Geomorphology, Longman, 1988 ISBN
уйӑхӗн 27-мӗшӗнче архивланӑ. ^ Bridges E. M." Northern Asia // World Geomorphology. Cambridge University Press, 1990. pp. 124—126. Росстат 2022 ҫулхи Ака