Published in Bollettino del Laboratorio in Portici, in 1916, in volume 10, pages 27-32

Created: 2012-06-22, modified: 2012-06-22

Published in Bollettino del Laboratorio in Portici, in 1916, in volume 10, pages 103-119

Created: 2012-06-22, modified: 2012-06-22

Published in Bollettino del Laboratorio in Portici, in 1916, in volume 11, pages 120-135

Created: 2012-06-22, modified: 2012-06-22