International union for the scientific study of population, Liege Belgium Leridon, Henri Menken, Jane <br/><br/>
Natural fertility, patterns and determinants of natural fertility / Henri Leridon and Jane Menken 

 - Belgium  IUSSP  1979 
 - xv, 556p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Demography<br/>Fertility