1. Agricultural Research Review 59;MM Badr El-Din,1981
2. Am. Soc. Agron. Series (9);CA Black,1982
3. Farming in South Africa Series: Vegetable Cultivation in South Africa Green beans and green peas No. B. 1/1977;AF Coertze,1977
4. El-Gharably GA and Abd El-Razek M (1982), Responses of snap beans to applications of P and Fe in calcareous soil. Journal of Plant Nutrition 5: 721–728.
5. El-Shall A, Wassif M, Hilal M and El-Bagouri I (1987) Response of barley to sulfur application in a calcareous soil under saline irrigation water. Desert Instit. Bull., A.R.E. 37. No. 1: 177–130.