Individual onsite wastewater system :  proceedings of the fourth national conference 1977 / 
sponsored by National Sanitation Foundation and U.S. Environmental Protection Agency Technology Transfer Program edited by Nina I. McClelland 
 - Ann Arbor :  Ann Arbor Science,  1978 
 - 238p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0250402106 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage disposal--Congresses--United States<br/>Sewage disposal--Law and legislation zx United States--Congresses