A report upon present and prospective means fo improved re-use of water / 
By earnest f. gloyna... [y otros.] 
 - 195 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agua--Purificación<br/>Conservación del agua
<br/><br/><label>LC Class. No.: </label>TD388.5  / R46