Simpson, William T. Theories of electrons in molecules. - Englewood Cliffs, N.J. Prentice-Hall 1962. - 183 p. illus. 24 cm. - Prentice-Hall international series in chemistry . LCCN: 62019680 /L/r83 Subjects--Topical Terms: Molecular theoryElectrons. LC Class. No.: QD461 / .S47 Dewey Class. No.: 541.2