Code of Practice for Ecotourism Operators, Big Volcano. Volcano, B. 2001.
bibtex   
@book{volcano_code_2001,
	title = {Code of {Practice} for {Ecotourism} {Operators}, {Big} {Volcano}},
	language = {it},
	author = {Volcano, Big},
	year = {2001},
}

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