Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) YAGI Setsuo and KITAMURA Satoshi,Studies on the Extraction of Potassium in Kali-rhyolite,Journal of the Mining and Metallurgical Institute of Japan,03694194,The Mining and Materials Processing Institute of Japan,1961,77,878,583-586,https://cir.nii.ac.jp/crid/1390001205981247616,https://doi.org/10.2473/shigentosozai1953.77.878_583