Ferro-hornblende from
Italy | |
| www.handbookofmineralogy.org (2011) http://www.handbookofmineralogy.org/pdfs/ferrohornblende.pdf |
| King, Van (n.d.) Personal communcation. |
| |
www.handbookofmineralogy.org (2011) http://www.handbookofmineralogy.org/pdfs/ferrohornblende.pdf | |
| Russo, M. (2003) Mineralogia vesuviana: le cave di Villa Inglese (Torre del Greco, NA). Micro (località), 1-10 |
Mount Somma, Somma-Vesuvius Complex, Naples, Campania, Italy