@book{19507,
	author = {Dicken, Samuel N. and Pitts, Forrest R.},
	title = {Introduction to cultural geography; a study of man and his environment},
	publisher = {Xerox College,},
	year = {1970},
	address = {Lexington, Mass. :},
	edition = {2 ed.},
	note = {Titulo de la primera ed. : Introduction to human geography}
}