International conference on transportation infrastructure on developing countries, Merida, Yucatan, Mexico, November 13-16, 1972 :  memory / 
[sponsored by] Secretariat of Public Works, Mexican Highway Association, University of the Americas. 
 - lxxiv, 176 páginas, [3] hojas de láminas :  ilustraciones 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Regiones subdesarrolladas--Congresos, conferencias, etc.<br/>Transporte--Congresos, conferencias, etc.
<br/><br/><label>Dewey Class. No.: </label>380.509172  / I61i 1972