Booklet "The Electric Spark" by William Otis Sawtelle. Reprint from the Astrophysical Journal, Vol. XLII, No.2 September 1915
Citation
“Booklet "The Electric Spark" by William Otis Sawtelle. Reprint from the Astrophysical Journal, Vol. XLII, No.2 September 1915,” Islesford Historical Society, accessed May 12, 2024, https://ihs.digitalarchive.us/items/show/469.Item 2146