Vol. s3-48, Issue 284, 1894August 01, 1894 EDT
The Stratigraphic Position of the Thomson Slates [Minnesota]
The Stratigraphic Position of the Thomson Slates [Minnesota]
Josiah Edward Spurr,
Spurr, J. E. (1894). The stratigraphic position of the Thomson slates [Minnesota]. American Journal of Science, s3-48(284), 159–166. https://doi.org/10.2475/ajs.s3-48.284.159