www.e-booksdirectory.com/chemistry.php
Macrocyclic chemistry .PDF
www.intechopen.com/books/infrared-spectroscopy-materials-science-engineering-and-technology
www.intechopen.com/books/raman-spectroscopy
www.intechopen.com/books/vaccines-the-history-and-future
www.intechopen.com/books/vaccines
Heterocyclic Chemistry
Introduction to Spectroscopy by Pavia
organometallic and Bioinorganic