@book{180211,
	author = {United Nations Industrial Development Organization.},
	title = {Information sources on the cement and concrete industry /},
	publisher = {United Nations,},
	year = {1977.},
	series = {[Document] - United Nations ; ID/185},
	address = {New York :},
	edition = {Rev. ed.},
	note = {Introd. and explanatory notes in English, French, Russian, and Spanish.}
}