@techreport{oai:tsukuba.repo.nii.ac.jp:00022779,
 author = {Lee, Yong-Song and Kuroda, Yoshimi and 黒田, 誼},
 month = {},
 note = {Includes bibliographical references},
 title = {Effects of research and extension activities on the agricultural production technology in postwar Japan, 1957-1997},
 year = {2001}
}