791.4 Aca R Academy of Motion Picture Art and Sciences Recording sound for motion pictures. Ed. by Lester Cown. New York, McGraw-Hill, 1931. xi, 404 p. ilus., diagrs. 24 cm <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0010436" property = "oa:link" href="http://www.worldcat.org/oclc/2682852 ">WorldCat</a>