Penstocks and outlet pipes / 
United States, department of the interior, bureau of reclamation 
 - 386 páginas 
 - Boulder canyon project. final report ;  pte. 4. design and construction ;  bulletin 5 .
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Rio Colorado<br/>Hoover, Presa
<br/><br/><label>LC Class. No.: </label>TC425.C6  / E774