https://www.b-prisma.de/hersteller/projekte/wilde-spieth/
- Wilde + Spieth Klassiker Funiture
a path through the web to GDL sources
https://www.b-prisma.de/hersteller/projekte/wilde-spieth/
https://www.nationalbimlibrary.com/en/archicad/
http://web.tiscali.it/oggettixarchicad/
http://favier.francois.free.fr/lgd/obgdl.html
http://www.skoldinov.spb.ru/obj.php?lang=en
gdl.graphisoft.com/reference-guide
http://4dlibrary.com.au/library/