Individual onsite wastewater systems 
/ Proceedings of the first national conference 1974 
 - Michigan:    Ann Arbor Science,   1977 
 - 166p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Subjects--Index Terms: </label>Environmental science 
<br/><br/><label>Universal Decimal Class. No.: </label>628.3(082.2)  / L7