Appropriate technologies in civil engineering works in developing co untries :   an exploratory appraisal of the state of the art /  
Depa rtment of Economic and Social Affairs. 
 - New York  :   United Nations,   1976. 
 - vii, 64 p.  ;    24 cm. 
<br/><br/>  "United Nations publication. Sales no. E.76.II.A.2." 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Public works ----Developing countries.----