by Eberhardt, P., Geiss, J., Gr gler, N.
Published in Mineralogy and petrology (1965)

by Gr gler, N., Gr nenfelder, M., Schroll, E.
Published in Mineralogy and petrology (1965)

by J ger, Emilie, Gr nenfelder, M., Gr gler, N., Schroll, E.
Published in Mineralogy and petrology (1965)