(mining Division) Industry House, 18th Floor, 10, Camac Street,, Kolkata - 700017, West Bengal, India
Dlf It Park I, Tower – C, 14th Floor, Plot No– 8, 59 Arterial Road, Rajarhat,, Kolkata - 700156, West Bengal, India
Flat No-29-b, Ravindra Sarani,, Kolkata - 700073, West Bengal, India
E-303, City Centre Blk,, Kolkata - 700064, West Bengal, India
10a, Rajab Ali Lane,, Kolkata - 700023, West Bengal, India