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Science and Technology: for Civil Services examinations/

Bibliographic Details
Main Author: Ashok Kumar Singh
Format: Printed Book
Published: New Delhi: McGraw hill, 2008
Subjects:
Online Access:https://books.google.co.in/books?id=CzV1MgFH6oMC&pg=PA16&dq=9780070655485&hl=en&sa=X&ved=0ahUKEwiM0_yXpPPaAhUItpQKHSoACfgQ6AEIKTAA#v=onepage&q=9780070655485&f=false