547 Will I Williams, Roger John, 1893- An introdution to organic chemistry. 4th. ed. New York, D. Van Nostrand [1941] 628 p. ilus. 22 cm <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof1100409" property = "oa:link" href="http://www.worldcat.org/oclc/ 805731408 ">WorldCat</a>