Varshney R S, . (1977). Hydro Power Structures. Roorkee: NEM CHAND & BROS.
Varshney R S, . 1977. Hydro Power Structures. Roorkee: NEM CHAND & BROS.
Varshney R S, . Hydro Power Structures. Roorkee: NEM CHAND & BROS. 1977.