Sweezy, Alan. <br/><br/>
Recent light on the relation between socio-economic development and fertility decline. 

 - Pasadena :  Carlifonian Institute of Technology,  1973. 
 - Caltech Population Program Occasional Papers .
<br/><br/> This paper uses two countries, Bulgaria and Portugal, to show how large the degree of freedom is which characterizes the historical relation between fertility decline and socio-economic development. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population dynamics.<br/>Population decline -- Population density -- Social development//Economic development/.--Population decline -- Population density -- Social development//Economic development/.--Population decline -- Population density -- Social development//Economic development/.