Varshney R S, . (1986). Hydro Power Structures. Roorkee: NEM CHAND & BROS.
Varshney R S, . 1986. Hydro Power Structures. Roorkee: NEM CHAND & BROS.
Varshney R S, . Hydro Power Structures. Roorkee: NEM CHAND & BROS. 1986.