621. 312 B Beardsley , Refus Charles, 1872- Design and construction of hydroelectrc plants, including a especial treament of the design of dams. New York, Mc, 1907. viii, 512 p. ilcl. ilus . tables . dia 24 cm . <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0100047" property = "oa:link" href="http://www.worldcat.org/oclc/913151335">WorldCat</a>