Howlite from selected localities.
USA | |
| Murdoch, J., Webb, R. (1966) Minerals of California. California Division of Mines and Geology Bulletin 189. |
| Giles, W.B. (1903), Bakerite (a new borosilicate of calcium) and howlite from California: Mineralogical Magazine: 13: 353-355; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 95. |
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 362. |
Pacific Mine, Calico, Calico District, Calico Mts, San Bernardino County, California, USA