Decision methodology for maintenance and upgrading :  costs, traffic, and benefits = Methodología de decisiones en la conservación y mejora : costos, transito y beneficios = Méthodologie de prise de décision en matière d'entretien et d'amelioration : coûts, trafic, et avantages / 
Transportation Research Board, Commission on Sociotechnical Systems, National Research Council. 
 - Washington :  National Academy of Sciences,  1980. 
 - xxxii, 211 p. :  ill. ;  28 cm. 
<br/><br/> "Prepared under contract AID/OTR-C-1591, project 931-1116, U.S. Agency for International Development."  English, French, or Spanish. 
<br/><br/>
<br/><br/><label>ISBN: </label>030902997X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MCE<br/>Roads--Maintenance and repair.--Developing countries<br/>Transportation--Developing countries.
<br/><br/><label>Dewey Class. No.: </label>388.112  / NAT