Geology of the Healdsburg quadrangle, California,
by William Kelso Gealey [and] Mineralogy of the California glaucophane schists, by George Switzer.
- San Francisco, 1951.
- 76 p. illus., maps (1 fold. col.) 24 cm.
- California. Dept. of Natural Resources. Division of Mines. Bulletin 161 .
- Bulletin (California. Division of Mines) ; no. 161. .