033-2321-3261
Head Office: Bikash Bhavan (2nd Floor), East Block
2nd Floor ‚ SaltLake
Kolkata - 700091
Phone No.: 033-2321-3261
Fax No. 033-2334-5199
Email Id.: president.ros@gmail.com
Branch Office(Kolkata): Tantuja Bhavan
6th Floor ‚ SaltLake
Kolkata - 700064
Phone No.: 033-2334-3399
   
Branch Office(North Bengal): North Bengal Regional Office
Rahul Sankrityan Bhavan
P.O- North Bengal University
Dist - Darjeeling

Mobile No 9933053737 , 83178 22703
Address
Bikash Bhavan (2nd Floor), East Block
2nd Floor ‚ SaltLake
Kolkata - 700091
Contact No.
033-2321-3261