741 B Blair, Lawrence E. Principales and practice of show-card writing 2d ed. New York & London, McGraw-Hill, 1937. xiv, 241 p. ilus. 23 cm (Industrial education series). Obra profusamente ilustrada. <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0120048" property = "oa:link" href="http://www.worldcat.org/oclc/1080181130">WorldCat</a>