Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SUGIYAMA Michio,Economic Considerations on Poultry Development in Japan II,Japanese poultry science,0029-0254,Japan Poultry Science Association,1980,17,2,53-63,https://cir.nii.ac.jp/crid/1390001206457629952,https://doi.org/10.2141/jpsa.17.53