Cria de gusanos de seda en Ayala

 Fuente: Euskariana

https://www.euskariana.euskadi.eus/euskadibib/es/serials/issues-by-date.do?sourceCommand=serials%2Flist-by-header.do%3Fletter%3Dn&query-year=1883&query-publicationId=2321&publicationId=2321&queryType=calendar&position=251