1. Bansal , N.K. and George , O.P. , 1993 ,Solar Drying in India and other Asian Countries, ibid ECOFYS , Utrecht , pp. 15 .
2. Palaniappan , C and Kumar , S. , 1993 ,Status Paper on Solar Drying for Plantation Crops, ibid ECOFYS , Utrecht , pp. 45 .
3. Reuss , M. , 1993 ,Solar Drying in Europe, ibid ECOFYS , Utrecht , pp. 89 .
4. Segal , I. and Pasternak H. , 1993 ,Large Scale Utilization of Solar and Alternative Energies for Agriculture, ibid ECOFYS , Utrecht pp. 75 .