@book{55361,
	author = {Gregory, K. J. and Lewin, John,},
	title = {The basics of geomorphology :},
	publisher = {SAGE,},
	year = {2014.},
	series = {The basics of physical and environmental geography},
	address = {Los Angeles :},
	url = {https://sk.sagepub.com/books/the-basics-of-geomorphology-key-concepts}
}