Digital Library 

NDLI-National Digital Library of India

https://ndl.iitkgp.ac.in/

Lucknow Digital Library

https://lucknowdigitallibrary.com/

Hathi Trust Digital LIbrary

https://www.hathitrust.org/ 

International Children's Digital Library

http://en.childrenslibrary.org/ 

DRTC Librarians digital library

www.drtc.isibang.ac.in

Networked Digital Library of Thesis and Dissertations (NDLTD)

http://www.ndltd.org/ 

Digital Library PCE-Poornima College of Engineering (Study Material) 

https://drive.google.com/drive/folders/0B1Z_ekHM9yAzc1R5Z1JoRnZHNEE?resourcekey=0-sbePhEPQojSysVlCdz29fw