Environment and child development :  introducing a recent publication expounding a theory of the ecology of human development 

 - Paris :  New York :  Rome :  UNESCO;  UNICEF;  WFP,  1980. 
 - 11 p. 
 - Notes, comments...;  52. .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>372.3 =20 ENV No.52.