National Report on environment   For the United Nations Conference on Environment and Development SUMMARY / 
Secretary of social Development. 
 - 1a ed. 
 - México :  Secretary of social Development,   1992 
 - 32 p.:  ils.;  21 cm. 
<br/><br/>Incluye índice 
<br/><br/><label>ISBN: </label>968838111x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología --Congresos, Conferencias etc.