Keyword "FELDSPARS" in:
Hyalophane in Czech phonolites
Fediuk,F., Fediuková,E., volume 30, 1997 (GRR for 1996), pages 145–146
pdf (0.21 MB)
Hyalophane in Czech phonolites
Fediuk,F., Fediuková,E., volume 30, 1997 (GRR for 1996), pages 145–146
pdf (0.21 MB)