@book{9648,
	author = {International Conference of Economic Services. and Tinbergen, Jan,},
	title = {International abstract of economic statistics, 1919-1930.},
	publisher = {International Conference of Economic Services,},
	year = {1934.},
	address = {London,},
	note = {"A French issue has been prepared by the Permanent Office of the International Institute of Statistics."--Introd.}
}