Railway Non Tech Graduate Book (Bengali) is published by Kiran Prakashan. It is available in Bengali medium. Best Guide Book cum Reference Book for Railway / RRB Exam Preparation. Consist of Previous Years Solved Question Papers. RAILWAY NON TECHNICAL GRADUATE LEVEL CBT 2016 PRACTICE WORK BOOK (BENGALI). Useful for the recruitment exam to the post of: Commercial Apprentice (CA), Traffic Apprentice (TA), Goods Guard, Junior Accounts Assistant cum Typist, Senior Clerk cum Typist, Assistant Station Master ASM, and Traffic Assistant.