@book{58760,
	author = {Dirac, P. A. M. and  Dirac, P. A. M.},
	title = {The Principles of Quantum Mechanics.},
	publisher = {:Oxford University Press },
	year = {2018},
	series = {International series of monographs on physics .27},
	address = {Oxford , U K },
	edition = {4th Ed. ( South Asian ) }
}