. . "Xuenong Zhan"@en . . "Hsüeh-nung" . . "詹学农" . . "1900" . . "詹学农" . "詹学农" . "Zhan"@en . "Chan" . "詹學農" . "詹学农." . . "詹学农." . "Hsüeh-nung Chan" . "Xuenong"@en . "詹學農" . . . "Zhan, Xuenong"@nl-NL . "詹學農" .