Library preserve various collection i.e. Knowledge and this Knowledge is wealth
Marketing Management e-Books:
https://www.pdfdrive.com/category/34
https://www.freebookcentre.net/Business/Marketing-and-Sales-Books.html
https://bookboon.com/blog/2011/12/free-ebooks-most-popular-marketing-and-management-books/
https://bookboon.com/blog/2011/12/free-ebooks-most-popular-marketing-and-management-books/
https://www.free-ebooks.net/marketing
https://www.researchgate.net/publication/235362523_Marketing_Management_The_Millennium_Edition