Kindly refer Following links of various publishers catalogue for filling book demand slip :
DIAOMOND BOOKS- https://www.diamondbookspune.com/
NIRALI PRAKASHAN- https://www.pragationline.com/
TECHMAX PUBLICATION-http://portal.techmaxbooks.com/home
HIMALAYA PRAKASHAN- www.himpub.com
ATHARVA PUBLICATION-atharvapublications.com
SETH PUBLICATION- http://www.shethpublishers.com/Home
TAXMAN PUBLICATION- https://www.taxmann.com/index.aspx
PHADKE pRAKASHAN- http://www.phadkebooks.in/PBH/
CONTINENTAL PUBLICATION- https://continentalprakashan.com/index.php
PRASHANT PRAKASHAN- https://prashantpublications.com/
PEARSON BOOKS- https://in.pearson.com/
KINDLY REFER ONLINE CATALOGUES OF VARIOUS ONLINE BOOK VENDORS/ STORES:
2. https://www.amazon.com/books-used-books-textbooks/b?ie=UTF8&node=283155
3. https://play.google.com/store/books?hl=en
FOR FREE E- BOOKS COLLECTION REFER THIS -> DIGITAL RESOURCES