Gullaskruvs glasbruk http://sv.wikipedia.org/wiki/Gullaskrufs_glasbruk http://digdok.se/wp-content/uploads/2016/03/Gullaskruv-Fogelberg.pdf https://www.lansstyrelsen.se/download/18.42b3306a1650dd83e9d481c0/1539155543783/Gullaskruvs%20%20glasbruk%20-%20Kulturhistorisk%20guide%20i%20glasbruksmilj%C3%B6.pdf
