Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) OKAMOTO Masahiro and ABE Hidenori,"The Chewing Activity of Sheep Fed with Rice Straw Treated with Ammonia, Steam and Ammonia after Steam Treatment",Nihon Chikusan Gakkaiho,1346907X,Japanese Society of Animal Science,1990,61,2,157-161,https://cir.nii.ac.jp/crid/1390282680172577536,https://doi.org/10.2508/chikusan.61.157