004430000a22001450004500003000900000005001700009100001800026245009400044264007400138490003900212300000900251041000800260650001500268650001400283PH-MaWHO20241108112150.0 aRichtering J. aModelling fertility and mortality rates in the framework of a demographic-economic model. aGeneva : bUnited Nations Conference on Trade and Development,c1985. a(UNCTAD discussion papers; no.15). a35p. aeng aDemography aFertility