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Author/Creator
- British Society of Soil Science3
- Inter-American Institute of Agricultural Sciences2
- Jacks, G. V. (Graham Vernon)2
- Moskovskiĭ gosudarstvennyĭ universitet im. M.V. Lomonosova2
- Scripta Technica, inc2
- Sea Fisheries Research Institute (South Africa)2
- Stewart, B. A. (Bobby Alton), 1932-2
- Agricultural Institute of Canada1
- American Institute of Biological Sciences1
- American Society for Horticultural Science1
- American Society of Agricultural Engineers1
- American Society of Agricultural Engineers. Soil and Water Division1
- Asian Network for Scientific Information1
- Bio-dynamic Farming and Gardening Association1
- British Society of Animal Science1
- Bŭlgarsko pochvovedsko druzhestvo1
- C.A.B. International1
- Canadian Society of Soil Science1
- Centre for Maritime Research1
- Crop Science Society of America1