Science et vie
La Science et la vie, aprile 1920.
https://gallica.bnf.fr/ark:/12148/bpt6k6545435n/f94.item.r=coffres%20forts%20manganese%20bauche%20fichet#
La Science et la vie, aprile 1920.
https://gallica.bnf.fr/ark:/12148/bpt6k6545435n/f94.item.r=coffres%20forts%20manganese%20bauche%20fichet#