@book{irrigation+practice+and+engineering+vol+2+conveyance+of+water+general+considerations+and+features+pertaining+to+irrigation+systems+conveyance+of+water+in+canals+tunnels+flumes+and+pipe, author = {Etcheverry, Bernard Alfred}, title = {Irrigation practice and engineering. Vol. 2, Conveyance of water : general considerations and features pertaining to irrigation systems; conveyance of water in canals, tunnels, flumes and pipe}, address = {New York i London}, publisher = {McGraw-Hill Book Company}, date = {1915} }