@book{185525,
	author = {Workshop on Clay Building Materials Industries in Africa and United Nations Industrial Development Organization.},
	title = {Clay building materials industries in Africa /},
	publisher = {United Nations,},
	year = {1971.},
	series = {[United Nations. Document] ID/71; (ID/WG.81/27)},
	address = {New York :},
	note = {"United Nations publication. Sales no.: E.71.II.B.24."}
}