Research in population economics :  an annual compilation of research / 
editor : Julian L. Simon 
 - Greenwich, Connecticut :  Jai Pr ess,  1978- 
 - v. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0892320184 (j.1) 0892321253 (j.2) 0892322071 (j.3) 089232242X (j.4)