Note 15 — Chapter VII · THE FERTILIZER GROUP OF MINERALS
Reading edition
Gale, Hoyt S., The potash deposits of Alsace: Bull. 715-B, U. S. Geol. Survey, 1920, pp. 17-55.
Reading edition
Gale, Hoyt S., The potash deposits of Alsace: Bull. 715-B, U. S. Geol. Survey, 1920, pp. 17-55.