@book{383034,
	author = {INTERNATIONAL SYMPOSIUM ON MAXIMUM ALLOWABLE CONCENTRATIONS OF TOXIC SUBSTANCES IN INDUSTRY},
	title = {Proceedings of the International Symposium on Maximum Allowable Concentrations of Toxic Substances in Industry, held in Prague, Czechoslovakia, April 1959},
	publisher = {Butterworths},
	year = {1961},
	address = {London}
}