Author
United States. Bureau of Reclamation
4
Gosudarstvennyĭ agropromyshlennyĭ komitet SSSR
2
Nōgyō Doboku Gakkai
2
Soviet Union. Ministerstvo meliora︠t︡sii i vodnogo khoz︠i︡aĭstva
2
United States Reclamation Service
2
United States. Dept. of the Interior. Water and Power Resources Service
2
Bulgaria. Ministerstvo na zemedelieto
1
Drainage Research Centre (Pakistan)
1
Drainage and Reclamation Institute of Pakistan
1
Gosudarstvennyĭ proizvodstvennyĭ komitet po oroshaemomu zemledeli︠i︡u i vodnomu khoz︠i︡aĭstvu SSSR
1
Institut nauchnoĭ informa︠t︡sii (Akademi︠i︡a nauk SSSR)
1
International Commission on Irrigation and Drainage
1
Kungl. Tekniska högskolan. Institutionen för kulturteknik
1
Lantbrukshögskolan. Institutionen för lantbrukets hydroteknik
1
Lantbrukshögskolan. Institutionen för markvetenskap. Avd. för lantbrukets hydroteknik
1
Nauchno-tekhnicheski sŭ︠i︡uz po vodno delo v Bŭlgari︠i︡a
1
Nauchno-tekhnicheski sŭ︠i︡uzi v Bŭlgari︠i︡a
1
Nauchno-tekhnicheskoe obshchestvo selʹskogo khoz︠i︡aĭstva. ︠T︡Sentralʹnoe pravlenie
1
Nōgyō Nōson Kōgakkai
1
Society for Promotion of Wastelands Development (India)
1
Soviet Union. Ministerstvo selʹskogo khoz︠i︡aĭstva
1
Sällskapet för agronomisk hydroteknik (Sweden)
1
Universitas Gadjah Mada. Test Farm P4S
1