Vol. s4-21, Issue 125, 1906May 01, 1906 EDT
Pre-Cambrian Rocks of the Georgetown Quadrangle
Pre-Cambrian Rocks of the Georgetown Quadrangle
Sydney H. Ball,
Ball, S. H. (1906). Pre-Cambrian Rocks of the Georgetown Quadrangle. American Journal of Science, s4-21(125), 371–389. https://doi.org/10.2475/ajs.s4-21.125.371