info:oai:pure.iiasa.ac.at:4703info:ofi/fmt:xml:xsd:bookLutzW.Lutz, W.SandersonW.C.Sanderson, W.C.ScherbovS.Scherbov, S.GoujonA.Goujon, A.19961853833495World population scenarios for the 21st centuryThe Future Population of the World: What Can We Assume Today?500bookitem