Sinha, D.K..
Studies in Environmental Mathematics: Perspectives and Approaches / - 1st ed / - New Delhi-2 : South Asian Publishers Pvt. Ltd. , 1982 - p.150 :
Mathematics
B0bG:5 / M3
Studies in Environmental Mathematics: Perspectives and Approaches / - 1st ed / - New Delhi-2 : South Asian Publishers Pvt. Ltd. , 1982 - p.150 :
Mathematics
B0bG:5 / M3