books.google.com - This Comprehensive Text Clearly Explains Quantum Theory, Wave Mechanics, Structure Of Atoms And Molecules And Spectroscopy.The Book Is In Three Parts, Namely, Wave Mechanics; Structure Of Atoms And Molecules; And Spectroscopy And Resonance Techniques.In A Simple And Systematic Manner, The Book Explains...http://books.google.com/books/about/Atomic_And_Molecular_Spectroscopy.html?id=0tIA1M6DiQIC&utm_source=gb-gplus-shareAtomic And Molecular Spectroscopy