University Press, 2013 – 1000 pg.- Режим доступу до слов.:
http:// www. oxfordreference.com
0. Lutgens K. Frederick, Tarbuck J. Edward. Essentials of
geology / Lutgens K. Frederick, Tarbuck J. Edward. – New
Jercey.: Pearson Prentice Hall, 2012. – 554 pg.
84