153 
Bibliography 
1. Ghosh, S.K. : Economic Aspects in Special Applications of Photo- 
grammetry; Invited Paper, ISP Com. VI ; Helsinki, 1976. 
2. Klein, L.R.: An Introduction to Econometrics; Prentice-Hall, N.J.; 
1962. 
3. Seiler, K* : Introduction to Systems Cost Effectiveness; Wiley-Inter- 
science; 1969. 
4. .Taylor, F.W.: Principles of Scientific Management ; Harper and 
Bros., New York ; 1910.