Works of "Research Collection"
Place Collected: Schneckenstein
Place Collected: near La Lama
Place Collected: Heinrichschacht Planitz
Place Collected: Fichtelgebirge Mtns.
Place Collected: Wiedersberg
Place Collected: Lake Onezhskoye
Place Collected: Wathlingen
Place Collected: Lake Baikal
Place Collected: Val Giuf
Place Collected: Alno Island
Place Collected: Fichtelgebirge Mtns.
Place Collected: Kara-tschagir Mtn.