Dirac, Paul Adrien Maurice, 1902- The principles of quantum mechanics / Paul Adrien Maurice Dirac. - 3rd ed. - Oxford : Clarendon Press , 1947. - xii, 311 p. ; 24 cm. - The International series of monographs on physics. . Subjects--Topical Terms: Matrix mechanics.--------Quantum theory.-------- Dewey Class. No.: 530.12