Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TAKAHASHI KOJI and KONDO YASUO and SAWANO TSUTOMU and MORI MASAO,Changes in pH of Coffee Extract depending on Temperature and its Quality,NIPPON SHOKUHIN KOGYO GAKKAISHI,00290394,Japanese Society for Food Science and Technology,1979,26,8,360-361,https://cir.nii.ac.jp/crid/1390001206405855232,https://doi.org/10.3136/nskkk1962.26.8_360