المؤلف
Michigan Agricultural College
7
Michigan State Fair
5
Farmers' Week (East Lansing, Mich.)
3
Michigan Farmers' Institute Round-up
3
Institut Pertanian Bogor. Fakultas Mekanisasi dan Teknologi Hasil Pertanian
2
Texas Farmers' Congress
2
Upper Peninsula State Fair
2
Agricultural and Mechanical College of Texas
1
Conferência económica do impéro colonial português
1
Congres international technique et chimique des industries agricoles Brussels, Belgium
1
Congrès international technique et chimique des industries agricoles Paris, France
1
Diskusi Teknis Pembinaan dan Pengembangan Alat dan Mesin Pertanian di Daerah Transmigrasi Bogor, Indonesia
1
Farmers' Week and the Housewives' Congress
1
Hadiwijaya, Thoyib
1
Indonesia. Badan Pendidikan, Latihan dan Penyuluhan Pertanian
1
Indonesia. Departemen Pertanian
1
Indonesia. Departemen Pertanian. Kantor Wilayah Propinsi Sumatera Selatan
1
Indonesia. Direktorat Jenderal Transmigrasi
1
Indonesia. Direktorat Pendidikan Menengah Kejuruan
1
Instituto Nacional de Tecnología Agropecuaria (Argentina)
1
Iowa State Fair
1
Iowa. Dept. of Agriculture
1
Kānsammanā Khrư̄akhāi Chāobān nai Sangkhom Wanakasēt
1
Manitoba Agronomists' Conference
1
Manitoba. Dept. of Agriculture
1
Manitoba. Manitoba Agriculture
1
Michigan Farmers' Institute. Meeting
1
Michigan Political Science Association. Meeting
1
Michigan State College
1
Michigan State Fair and Exposition
1
Michigan State University
1
Pekan Orientasi Ulama/Khatib Seluruh Indonesia
1
Penataran Pembinaan Usaha Persiapan Pendidikan Farmers Cooperative Centre Pola Luwu
1
Penataran Perencanaan Pembangunan Pedesaan dan Pertanian Universitas Gadjah Mada
1
Portugal
1
Rapat Teknis Informasi Pertanian Se Indonesia Wonocolo, Indonesia
1
Reunión Latinoamericana de Fitotecnia Buenos Aires, Argentina
1
Seminar Peningkatan Peranan dan Pengembangan Pendidikan Menengah Kejuruan Pertanian dalam Pembangunan Bogor, Indonesia
1
State Agricultural College (Mich.)
1
Texas. Dept. of Agriculture
1
Thailand. Samnakngān Khana Kammakān Watthanatham hǣng Chāt
1
Universitas Gadjah Mada. Departemen Ekonomi Pertanian
1
Valdez, José d'Ascensão
1
Wibūn Khēmchalœ̄m
1
Wisconsin Farmers' Institutes
1
Wisconsin State Agricultural Society
1