"Symposium" sôbre raios cósmicos /
Symposium Sôbre Raios Cósmicos(agôsto 4-8 1941 :Rio de Janeiro, Brazil)
Academia Brasileira de Ciências.
Rio de Janeiro : Imprensa nacional,
1943.
Group portrait accompanied by transparent sheet with identifying numbers.
Text in English, French or Portuguese.
Includes bibliographies.
Cosmic rays.