TY  - RPRT
TI  - Mineral equilibria in the system nepheline-alkali feldspar-plagioclase and their petrological significance
AU  - L.L. Perchuk
AU  - I.D. Ryabchikov
PY  - 1968
DO  - 10.1093/petrology/9.1.123
UR  - https://pubs.usgs.gov/publication/70221373
ID  - 70221373
ER  -