The standard work in the fundamental principles of quantum mechanics, indispensable both to the advanced student and to the mature research worker, who will always find it a fresh source of knowledge and stimulation. -Nature \"This is the classic text on quantum mechanics. No graduate student of quantum theory should leave it unread\"-W. C Schieve, University of Texas | The Principles Of Quantum Mechanics by P A M Dirac, Paperback | Indigo Chapters