Macdonald,O.J.S. <br/><br/>
Small sewage disposal systems / 
O.J.S.Macdonald, 
 - Colombo :  H amd C,Press,  c1951. 
 - xii, 293 p. :  ill. ;table,figs, photos.  21cm. 
 - Bulletin / Virginia Water Resources Research Center ;  171 .
 - Bulletin (Virginia Water Resources Research Center) ;  171. .
<br/><br/> "VPI-VWRRC-BULL 171, 3C." 
<br/><br/>Includes bibliographical references (p. 49-57). 
<br/><br/>
<br/><br/><br/>English 
<br/><br/><label>LCCN: </label>90066079  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification--Nitrogen removal.<br/>Sewage disposal.<br/>Sewage disposal--Virginia.
<br/><br/><label>LC Class. No.: </label>TD201  TD758.5.N58  / .V57 no. 171 
<br/><br/><label>Dewey Class. No.: </label>333.91/009755 s  628.3/MAS