Heisenberg, Werner. The physical principles of the quantum theory / Werner Heisenberg; translated into english by Carl Eckart and Frank C. Hoyt. - New York : Dover Publications , 1949. - iv,189p. : ill. ; 23cm . NULL ISBN: 0486601137 Rs. Subjects--Index Terms: QUANTUM THEORY Dewey Class. No.: 530.12 / HEI/P