New research techniques in physics; symposium organized by the Academia Brasileira de Ciencias and Centro de Cooperación Científica para América Latina (UNESCO) under the auspices of the Conselho Nacional de Pesquisas do Brasil, Rio de Janeiro and São Paulo, July 15-29, 1952. - Academia Brasileira de Ciências. (1954)
"Symposium sponsored by the International Union of Pure and Applied Physics and with the collaboration of the University of São Paulo."