On the Existence of Certain Elements, Together With the Discovery of Platinum in the Sun; Contributions From the Physical Laboratory of Harvard University
Hutchins, C. C., & Holden, E. L. (1887). On the existence of certain elements, together with the discovery of platinum in the Sun; contributions from the Physical Laboratory of Harvard University. American Journal of Science, s3-34(204), 451–456. https://doi.org/10.2475/ajs.s3-34.204.451