Solid wastes disposal and control 
By WHO 
 - Geneva  WHO  1971 
 - 34p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Refuse and refuse disposal<br/>Sewage Disposal<br/>Water --Purification
<br/><br/><label>Dewey Class. No.: </label>x83 w893