Bedi, C S and Aggarwal, R S Supplement to S Chand's general studies: for central civil services preliminary examination and all other high grade competitive examinations/ by C S Bedi and R.S.Aggarwal - New Delhi : Schand and company Ltd. , 1997 - 79pages ISBN: 8121914965 Dewey Class. No.: R 371.26 BED/S