616.73 Will L Williams, Paul C The lumbosacral spine: emphasizing conservative management. New York, Blakiston Division, McGraw-Hill [c1965] xi, 200 p. ilus. 24 cm. Bibliograf'ía al final de algunos capítulos <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof1100404" property = "oa:link" href="http://www.worldcat.org/oclc/440019680 ">WorldCat</a>