Published in Rodriguésia, in 1950, in volume 13, issue 25, pages 233-237

Published in Rodriguésia, in 1950, in volume 13, issue 25, pages 239-250

Published in Rodriguésia, in 1950, in volume 13, issue 25, pages 251-255

Published in Rodriguésia, in 1950, in volume 13, issue 25, pages 257-261

Published in Rodriguésia, in 1950, in volume 13, issue 25, pages 263-266

Published in Rodriguésia, in 1950, in volume 13, issue 25, pages 267-288