MacDonald O. J. S. <br/><br/>
Small Sewage Disposal System:  with special reference to tropics/ 
by O. J. S. MacDonald 
 - London:  H.K. Lewis & Co. Ltd.,  1951 
 - 294p.:  illus;  22cm 
<br/><br/>Includes bibliographical references and indexes 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage disposal