Vol. s3-41, Issue 245, 1891May 01, 1891 EDT
Columbite of the Black Hills, South Dakota
Columbite of the Black Hills, South Dakota
William Phipps Blake,
Blake, W. P. (1891). Columbite of the Black Hills, South Dakota. American Journal of Science, s3-41(245), 403–405. https://doi.org/10.2475/ajs.s3-41.245.403