Der untere lias am fonsjoch( ostliches karwendet- gebirge) und seine ammonitenfauna
Lange, Werner
The National Gem Collection
Institution, Smithsonian
Infinity's Encyclopaedia of Earth and it's Environment
/ Written by John Clark...[et others]
Thrust and nappe tectonics
Mcclay,K.R.
Flotation Properties of Rare Metal Minerals
Plaksin, Igor N.