543 Bel N2 Belcher , Ronald New methods of analytical chemistry [ by] Ronald Belcher and Cecilia L. Wilson in association with T.S. West. London , Champan and Hall [ c1964] xv, 366p. diagrs ., tablas . 23 cm Incluye bibliografia <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0100293" property = "oa:link" href="http://www.worldcat.org/oclc/541679">WorldCat</a>