Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Peter F Kane and A Altemeier and L L Austin and C V Beggs and R D Cathey and R Grant and J B Hester and S Hudson and W C Johnson and J Krause and V Midkiff and H F Morris and E E Mueller and M O’Neil and W V Perry and R D Smith and R Stedman and L D Steele and R N Tulloch and G VanDeKoppel and R M Vickery and G Willkens and D C Williams,Comparison of HgO and CuS04 as Digestion Catalysts in Manual Kjeldahl Determination of Crude Protein in Animal Feeds: Collaborative Study,Journal of AOAC INTERNATIONAL,0004-5756,Oxford University Press (OUP),1984-09-01,67,5,869-877,https://cir.nii.ac.jp/crid/1363670320940891392,https://doi.org/10.1093/jaoac/67.5.869