530 Aca N <a id="rdfa" resource="" property="dc:creator" href="http://viaf.org/viaf/267942273" target="_new">Academia Brasileira de Ciencias, Rio de Janeiro.</a> New research techniques in physics, symposium. Rio de Janeiro, 1954. 447 p. ilus. 28 cm <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0010185" property = "oa:link" href="http://www.worldcat.org/oclc/1743239 ">WorldCat</a>