Hartree, Douglas R. 1897-1958. The calculation of atomic structures / by Douglas R. Hartree. - New York : John Wiley & Sons, 1957. - xiii, 181 p. : ill. ; 23 cm. - Structure of matter series . Include index. Subjects--Topical Terms: Atomic structure.Numerical analysis. Dewey Class. No.: 539.14 / HAC 1957