Vol. s3-19, Issue 111, 1880March 01, 1880 EDT
On a Chart of the Magnetic Declination in the United States
On a Chart of the Magnetic Declination in the United States
J. E. Hilgard,
Hilgard, J. E. (1880). On a chart of the magnetic declination in the United States. American Journal of Science, s3-19(111), 173–175. https://doi.org/10.2475/ajs.s3-19.111.173