1. Role of Micronutrients in Efficient Crop Production;Mengel,1980
2. Function of micronutrients in plants;Römheld,1991
3. Trace elements in animal nutrition;Miller,1991
4. Boron nutrition of crops;Gupta;Adv. Agron.,1979
5. Molybdenum in soils, plants and animals;Gupta;Adv. Agron.,1981