| | | Fertilization of protected crops : La fe... | | | 2 bibl. |
| | International potash inst... | Fertilizer use and protein production : ... | 1975 | | 2 bibl. |
| | International potash inst... | Fertilizer use and plant health : procee... | 1976 | | 1 bibl. |
| | International potash inst... | Fertilizer use and production of carbohy... | 1977 | | 1 bibl. |
| | International potash inst... | Physiological aspects of crop productivi... | 1980 | | 1 bibl. |
| | International potash inst... | Soils in mediterranean type climates and... | 1979 | | 1 bibl. |
| | International potash inst... | Agricultural yield potentials in contine... | 1981 | | 1 bibl. |
| | International Potash Inst... | Potassium in soil : proceedings of the 9... | 1972 | | 1 bibl. |
| | International Potash Inst... | Potassium in biochemistry and physiology... | 1971 | | 1 bibl. |
| | International Potash Inst... | Potassium in the agricultural systems of... | 1985 | | 1 bibl. |