[1] Good, P. C., Beneficiation of Unweathered Indian Calcareous Phosphate Rock by Calcination and Hydration, US Bureau of Mines, Report No 8154, Washington (1976).
[2] Hignett, T.P., Doll, E. C., Livingston, O. H. and Raistrick, B., “New Developments in Phosphate Fertilizer Technology”, Carpentier, L. J. (Ed.) Sci Pub Co Elsevier (1977).
[3] Lawver, J. E., Mcclintock, W. O. and Snow , R. E., Miner Sci Eng., 10, 278 (1978).
[4] Lodha, T. R., Sinha, N. K. and Srivastava, A. C., Chemic Age of India, 35, 15 (1984).
[5] Hsieh, S. S., Ind. Eng. Chem. Res., 27,594 (1988).
[6] Ray, H. and Robert, J. P., Miner. Proc., 10, 13 (1969).
[7] Robinson, N., “Fisons’ Experience on the effect of Phosphate Rock Impurities on the Phosphoric Acid Plant Performance”, ISMA (IFA) Orlando (1978).
[8] Mew, M. C., “World Survey of Phosphate Deposits”, 4th Ed. The British Sulfur Corp. Ltd, London (1980).
[9] Baudet, G., Chron. Rech. Min., Special issue on Phosphates, 67 (1988).
[10] Somasundaran, P., 11th Int. Miner. Proc. Cong. Cagliari, 2,155 (1975).
[11] Hanna, H. S. and Somasundaran, P., In. “Flotation of salt type minerals”, Fuestenau M.C. (Ed), p.p. 197-272, A.M .Gandin Memorial Volume, AIME, New York.(1976).
[12] Lawver, J. E., Weigel, R. L., Snow, R. E. and Huang, C. L., 14th Int .Miner. Proc. Cong. Session, iv Flotation, Paper iv-20 (1982).
[13] Al-Fariss, T. F., Ozbelge, H. O. and Abdulrazik, A.M., Rock. Fert. Res., 29, 203 (1991).
[14] Hignett T. P., Proc. Int. Cong. Phos. Comp., 401 (1980).
[15] Hollick, C. T. and Wright, R., Trans. Insti. Miner. Metall., Section A-Mining, 95, A150 (1986).
[16] Ciccu,R., Ghiani, M., Peretti, R., Stta, F. and Zucca, A., Proc. Int. Cong. Mineral. Processing, 433 (1993).
[17] Brierley, C., Pour la Science, 60, 38 (1982).
[18] Harrison, J. R., Ann. Rev. Microbiol., 38, 265(1984).
[19] Hutchins, S. R. and Davidson, M. S., Ann. Rev. Microbiol., 40, 311 (1986).
[20] Costa, A. C. A., Medronho, R. A. and Pecanha, R. P., Biotechnology Letters, 14, 233 (1992).
[21] Crago, A., Process of Concentrating Phosphate Minerals, US Patent No 2, 293,640 (1940).
[22] Moudgil, B. M. and Chanchani R., Miner and Metall Proc., 2, 13 (1985).
[23] Moudgil, B. M. and Chanchani, R., Miner and Metall Proc., 2, 19 (1985).
[24] Ince, D. E., “Effect of Sodium Chloride on the Selective Flotation of Dolomite from Apatite”, Ph.D. Thesis, University of Florida (1987).
[25] Moudgil, B. M., Ince, D. E., Vasudevan T. V. and Sober, D., Miner and Metall Proc., 7, 53 (1990).
[26] Zhong, K.,Vasudevan, T. V. and Somasundaran, P., Miner Eng., 4, 563 (1991).
[27] Arafa, M. A., Modell. Meas and Cont., 43, 1 (1993).
[28] Judd, J.C. and Harbuck, D. D., Marine Georesources and Geotechnology, 11, 245 (1993).
[29] Alfantazi, A. M. and Amaratunga, L. M., J. Mines Metals and Fuels., 41, 54 (1993).
[30] Kangnian, Z., Yin, H. and Hengxing, X., J. Youse Jinshu., 46, 31 (1994).
[31] Zafar, I. Z., Anwar, M. M. and Pritchard, D. W., Int. J. Miner. Proc., 43, 123 (1995)
[32] Baumann, A. N. and Snow, R. E., Proc. 2nd Int. Cong. Phosphate Comp., April 21-25, Boston (1980).
[33] Hegner,P. and Pacl, Z., Report No PTE/74/12, 21P, Research Institute of Inorganic Chemistry, 40060 USTI NAD Labem Czechoslovakia, (1974).
[34] El-Jalead, I. S., Abouzeid, A. Z. M. and El-Sinbawy, H. A., Powder Technology, 26, 187 (1980).
[35] Sadeddin, W. and Abu-Eishah,S. I., Int. J. Mineral Proc., 30, 113 (1990).
[36] Abu-Eishah, S. I., El-Jallad, I. S., Muthaker, M., Touqan, M. and Sadeddin, W., Int. J. Mineral Proc., 31,115 (1991).
[37] Zafar, I. Z., Fert. Res., 34, 173 (1993).
[38] Zafar, I. Z., Anwar, M. M. and Pritchard, D. W., Fert. Res., 44, 133 (1996).
[39] Zafar, I. Z., Anwar, M. M. and Pritchard, D. W., J. Nutrient Cycling in Agroecosystems, 46, 135 (1996).
[40] Annon., Phosphorus & Potassium, 125, 29 (1983).